I took a local garage to small claims. You have to follow citizens advice to the letter, offering a negotiated settlement etc. The letters have to be set out in a certain way and in the correct order. Eventually, you may be offered mediation. It usually ends up with offers and counter offers via the mediator (no direct contact). I settled on a figure that I was happy with as I didn't want to waste time in court (but you do have that option if you are 100% sure of a result) For the £50 fee, it was worth it for my claim. Check the citizens advice website for full details and sample letters of intent etc.
https://www.citizensadvice.org.uk/la.../small-claims/
Good luck.