At this stage i'd recommend holding off on the SAR's to your bank and suppliers, but definately be prepared to move forward with this. The suppliers hould provide the infoamtion without too much trouble as they'll be keen to recover any monies owed.

Your energy bills will record what payments you have made (so initally no need to check these off agianst your bank records). If thigns don't add up after this then by all means send off the SAR's but you might jsut be able to save yourself £30 (or part thereof) first.