With a heritage stretching back 120 years, over 360,000 people across the UK trust WPA with their Health Insurance - from families to some of the largest companies in the country. WPA focus on providing market leading customer service - they are currently the highest rated UK Health Insurer on Trustpilot.

TTH specialise in innovative coaching for individuals and groups. They offer coaching support to our athletes including race specific training plans, pre-event training sessions and a virtual training club.

Take the hassle out of travelling with a bike and hire one for race day. On Your Bike's team of mechanics will be on hand for any fitting adjustments, pedal changes or installation of extra parts that you may want.

Need to hire a wetsuit? This is really easy, quick and affordable solution for making sure you have a high performance, technical Yonda wetsuit for race day. Simply enter the discount code CASTLE10 on the check out page to get 10% off!

Test the on-course electrolyte drinks, energy gels and chews before your race, or book a free one-on-one video consultation to discuss your strategy.

Keep up your fitness and test your speed, elevation and endurance skills from the comfort of your own home with Echelon bikes & treadmills. Don't let a busy lifestyle or bad weather impact your training regime!

Get stocked up on BeetActive and CherryActive concentrates, the perfect natural pre and post nutrition pairing enjoyed by leading endurance athletes, football, rugby and Olympic teams.

AWOL's photographers are positioned around the course, finish line and event village of all our events to capture you in action. They offer great discounts if you pre-book your race photos via your MyEVENTS account.

Make sure you're covered for any unforeseen circumstances. Yellow Jersey have a number of different options for event day cover, bike damage or theft and reimbursement due to injury.

Look the part when you're training in one of our Castle Race Series t-shirts. Share your photos using #CastleRaceSeries so we can see you in action.

Castle Race Series participants will receive 10% Off any Turbo Trainer Hire. Simply enter the discount code CASTLETURBO10 on the check out page. Turbo Trainer Hire offer a friendly and helpful service on a range of quality performance turbo trainers from wheel on to direct drives. With flexible hire periods, affordable prices, with no deposit and easy online hire process this is the ultimate try before you buy

Looking to buy a wetsuit? Yonda wetsuits are built with technical neoprene panels, the right balance of flexibility and buoyancy and will aid your swim style.