Electrical issues - looking for local garage

I have a 2011 two litre mx5 which is failing to start from time to time. I called out the AA who started it with jump leads charged the battery and said that I needed a new battery. When I took it in to a local garage they said that the battery was fine.  Could this be an electrical problem? can anyone recommend a local garage in the Cardiff area?

 

Could be the alternator, if you can get your hands on a multimeter put it across the battery terminals and check you are getting around 14v.

This could be yet another leaking scuttle grommet issue. There seem to have been quite a few lately. Water leaks onto the fuse box in the passenger foot well. Remove the glove box and look for water ingress.
Search this forum for scuttle grommets they cause all sorts of problems and are a quick, cheap, and easy fix.
Good luck.
D

Take it to Mark at TotalMX5 repair in Barry to check it out.

http://totalmx5repair.weebly.com/

 Mark at Total MX5 in Barry ,very good with electrics and all Mx5 repairs.