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Home | Classifieds | Useful Files | Links | 01948 666295 *

The Team

Tullis Matson (Founder and Managing Director)

Tullis began his career with horses working in racing stables where he spent two years as Assistant Trainer to Philip Hobbs. In 1990 he came home to run his father’s non thoroughbred stud at Twemlows Hall.

In 1993 he left for a study tour of New Zealand where he visited 17 studs and racing stables. Whilst travelling around New Zealand he completed a course on the Artificial Insemination (AI) of horses. At this point he returned home and Twemlows Hall Stud Farm began practising AI for the first time.

In 1996 the stud had grown on such a large scale that at this point Tullis started his own business Stallion AI Services Ltd, a Stallion Semen Collection Centre running from Twemlows Hall. From the outset he had a contract with Genus to carry out their collecting of semen prior to freezing. This soon developed into taking stallions in for freezing, chilling and fresh insemination. In 1997 he undertook further training at the University of Utrecht in Holland.

During the 18 years that stallion AI Services has been running Tullis has frozen semen from some of the world greatest stallions. He has frozen semen from more than 700 stallions and carried out over 10,000 collections.

In 2008, Tullis set up Equine Reproduction Supplies which is now the UK’s largest distributor of equine artificial insemination equipment and in 2010 was given the exclusive rights to distribute the world renowned “minitube” products in the UK.

In 2011 Tullis Matson received the Marsh Christian Award for Conservation in Genetic Bio-Diversity. He has been given the award for the technological advances he has brought to the field of equine semen freezing which has enabled some rare breeds to be collected from and frozen successfully for the first time. The award, run in conjunction with the Rare Breeds Survival Trust, recognises significant technical, scientific and practical contributions to the field of genetic bio-diversity. The Prince of Wales is among the award’s previous winners.

In his spare time Tullis loves nothing more than throwing himself out of planes, having done over 1600 skydives!!!!

Kate Ashmore (Stud Manager)

In 2005 Kate completed a 3 year BSc (Hons) Degree in Equine Science at
Rodbaston College in Staffordshire and over the next two years worked at the
college as the Assistant Yard Manager. During this 2 year period Kate completed
her Level 4 qualification in Further Education Teaching to enable her to teach
FE students as part of her role.

In 2008 Kate decided to follow her passion for equine breeding and came to
work at Twemlows Stud Farm where she completed her training as a DEFRA
approved AI Technician and went onto become the centres Assistant Manager,
caring for the 300 plus mares which pass through their doors each season for
insemination and Embryo-Transfer.

After her time at Twemlows Stud Farm Kate was offered the opportunity to manage one of Europe’s leading Arabian Stud Farms based Shropshire, working with world class stallions, mares and foals.  Kate ran the stud for two years, acquiring a great insight into International Arabian breeding and showing.

In 2010 Kate returned to Twemlows Hall to work for Tullis at Stallion AI Services as the Stud Manager.  Kate is responsible for ensuring the smooth running of the Semen Collection & Quarantine Centre and ‘Cryogenetics’ the Frozen Semen Storage & Distribution Centre.  Kate has just completed her 3rd breeding season at the stud and feels well and truly part of the furniture!!

A Quote From Kate – (Aug 2013) “Another amazing breeding season drawing to an end and I’ve had the pleasure of working with some of the world’s best stallions this year.   The quality through our door has been exceptional and just keeps on getting better year on year; I have big dreams and great hopes for 2014”. 🙂

Kate is currently on maternity leave after having a baby boy in September 2015, but she is keeping an eye on us, popping in from time to time to make sure we are behaving and keeping her seat warm for her return in June.

Faye Durrant (Office Manager)

In 2007, Faye completed her BA Hons degree in Classical Studies at The University of Manchester with a 2:1 and had a gap year as a Working Pupil for dressage trainer Gareth Hughes.

In 2008 Faye started working as a Sales Co-ordinator for a health insurance broker where she learnt to use various computer systems and support the Sales Team.  In 2009 she gained the opportunity to work on a new project where she advised customers on International Medical Insurance packages.

In 2010 she decided to embrace her passion for horses and became a groom and rider for a private dressage yard in Cheshire, where she cared for and rode a variety of horses ranging from novice to advanced level.  Whilst there, Faye’s interest in breeding prompted her to gain her AI Technician qualification and complete the Foaling The Mare course at Twemlows Stud Farm.

Faye became a member of the Stallion AI team in May 2012 and takes care of the centres office and endeavours to answer any queries you may have.  In her spare time she rides and competes her dressage horse, Viva Verdi at Advanced Medium and is aiming for top hat and tails, hopefully in the not so distant future!


Emma-Jayne Eldridge (E-J) Yard Manager

In 2013 we appointed E-J as our Yard Manager.

E-J started her career with horses at Eccleston Equestrian Centre where she qualified as a riding instructor, teaching riders of all ages and capabilities and caring for the centre’s horses. It was here and Wrea Green Equitation Centre that E-J obtained her BHS Stages 1, 2 and 3, BHS PTT teaching, NVQ 1 and 2 in Horse Care and Riding in an arena.

With this solid foundation under her belt, E-J went on to work as a Groom and, in time, a Deputy Yard Manager for International Dressage Rider Gareth Hughes from 2007 to 2008 and from 2008-2011, for Great British Dressage team member Emile Faurie. Her role in both positions involved schooling youngsters and caring for the competition horses and youngsters to a high standard. E-J accompanied Emile to international competitions and had sole responsibility for the care of his Grand Prix competition horse Elmegardens Marques. She also instructed new staff in the duties they were required to perform and implementing individual development plans for the horses. With E-J’s experience, you can rest assured that your stallion will receive 5 star care and he will be in safe hands!

In her spare time, E-J likes to train her border collie, Enzo, see live music and improve her combat training (which will certainly come in handy if we ever need security!)

Emily Byrne (Assistant Yard Manager)


Pamela Humphreys (Head Laboratory Technician/Stud Groom)

Pam joined the team in February 2011, and has proved to be skilled at many tasks from looking after the stallions to processing semen in the laboratory.

Previously Pam worked as the Yard Manager at Weybridge Equestrian Centre in Surrey for 11 years. In 2000 Pam completed a National Certificate in Equine Studies at Merrist Wood College in Guildford, her BHS Stage 1 and Riding and Road Safety. Pam is also a qualified AI Technician.

Pam’s spare time is spent with her own horse, a Welsh Sec D Cob, Spartacus, leaving sometime for her neglected husband and 2 children, a boy and girl, who keep her on her toes.

Kat Robinson (Stud Groom)

Kat was a seasonal employee in 2013 and has returned to us as a full time Stud Groom in March 2014. We are delighted to have her, she is an asset to the team providing valuable knowledge and support in semen collections. She previously worked for Emily Llewellyn as her event groom, looking after a variety of stallions, mares and geldings. She groomed at events both nationally and internationally including Boekelo 3* in Holland. In her spare time, Kat breaks in young horses to sell and you can also find her on the hunting field.




Amy Boxshall (Stud Groom)

Amy has also recently joined the ranks at Stallion AI Services and brings with her a great deal of experience in numerous field in the equine industry. She has competed in dressage, eventing, show jumping, team chasing and showing making her an allround horsewoman. In addition, she specialises in re-schooling “problem” horses in her spare time, restoring their confidence and trust. Her stud experience is as extensive as her competition record so you can be sure that your stallion is in capable hands.



Charity (Head Teaser)

Charity is the most senior member of the Stallion AI Services team.  She has been with us for 12 years now and over the years has really seen it all!

Charity is responsible for the smooth running of the collections in the mornings, and is excellent at showing young stallions how it’s all done.  She is a kind, sweet natured, placid mare and will stand for the most inexperienced of stallions.

It’s extremely important that Charity is looked after to the highest standards and kept happy, happy Charity = happy stallions = happy staff.

At night charity demands to be taken to her 5* stable where she receives her evening banquet!!!!!!