Spending on ex's accounts

[User3637389291]

Hi, my friends who were married broke up last year (cheating, not on good terms). They were going through divorce proceedings and it came to light that one of them had managed to log into the other's accounts (e.g. Amazon, PayPal, eBay) and had been buying things. Overall it amounted to a few hundred pounds. The other found out and changed all details and put a stop to it, but has gotten proof from the bank that it was their ex that did the transactions, and has been refunded for them. Not long after this, the divorce was finalised.
I was just wondering where they stand legally, to me it was illegal, however I'm not sure if the fact they were still technically married makes a difference? Also, if they wanted their ex to be prosecuted is that possible/ what would be the process?
Thanks in advance!

Honestly, in the grand scheme of things, I'd let it go. Things are acrimonious as they are, morally/ethically/financially/legally for the sake of a couple of hundred quid it really isn't worth the fuss.

Potentially it is an offence but I doubt the police would want to get involved. They could start a private prosecution but I agree with the previous poster. By all means ask for it to be taken into account in the financial settlement but starting a criminal prosecution is unlikely to be a good idea.