Legal advice needed re Barclays

[Lenza]

We were victims of a substantial fraud 7 years ago. The Met police have been investigating for 3 years and have identified that monies went to two sources. One was an alleged victim of the same scam who had persuaded the perpetrator to refund him (so unbeknownst to us we made the payment to him direct from our account believing we were paying to a lawyer's account). The balance of the money was paid from us to a second account. This was a relation of the perpetrator who has insisted to the police that he did not open the account and knew nothing of it. All accounts, including ours, were with Barclays. Do we stand any chance of getting anything back from either Barclays or the person we inadvertently refunded?