You have a good claim against local Highways authority.
First off al, go to
http://streetrepairs.co.uk/ and se if the section of road you refer to is on there and if the pothole has been reported. If t has been previously reported, it wil provide you with good additional evidence to back up the photo's you already have. If it is not on there, then report it yourself (it is free) as it will get things moving and may prevent a similar fate befalling another rider.
Then, you need to write a letter of claim to the local Highways holding them responsible. In the letter provide details of exact location along with the size and depth of the pothole, so depth and width required and tell them that you are holding them responsible for the cost of the damage to your wheels because of the pot hole not having been repaired.
They will probably come back with the statutory defence under the Highways Act to try and deter you, but don't let that put you off, it is standard practice.
Give them 7 days to respond and make it clear that unless they respond in that time, it is your intention to issue proceedings against them.
If you need to issue proceedings, it is very simple and can be done online or you can pop into the local county court and staff will help you complete the paperwork. It will cost a few bob (not a vast amount) but this will be claimed back when you win the case.
You probably will not get a solicitor to write a letter unless you have a pal or family member because for damage litigation, legal fees for claims under £5,000 cannot be claimed back, and so a solicitors letter would be at your cost, and the local authority know this, they also know that solicitors do not usually deal with pot hole claims and do not have much of a clue.
Again if you go to
http://streetrepairs.co.uk/pothole-claim this part of the website tells you far better and clearly than me how to make a claim.
If you get stuck, speak to Colin who owns the site and who I know very well tell him that I suggested that you contact him and I am sure he will be delighted to help.
Hope this helps
It is better to arrive 30 seconds late in this world than 30 years early in the next