Hope you've changed the wheel
Yes quite likely was the pothole. Go back and take some pics, take tape measure or use credit card or whatever to show the depth of the hole and any sharp ridge
Also take showing position so stand a few paces back and show view up road (this will be proof of its location)
The contact Highways tomorrow and they will send you relevent forms
Would strongly suggest you get the wheel checked for buckling at local tyre centre , if you are getting a new tyre on there straight away they will be able to tell you when it is on the machine. Dont forget to keep the old tyre
If you are using spare for the mo , take it in and get them to spin it up on the machine
I had two ruined Oz wheels due to potholes but had thought it was only the tyres at the time becuase they didnt look buckled