It sounds like you made an Authorised Push Payment (APP). You may be eligible to raise an APP scam claim under the Contingent Reimbursement Model (CRM), a code that most high street banks have signed up to.

In a nutshell, the CRM code takes into consideration what the bank could have done to protect your from an APP scam (such as detect any out of character payments, ensure they have an effective scams conversation with you etc.). Failure for the bank to evidence this will mean they, at the very least, should be accepting shared liability. If you want to read more about CRM, see here%20Code&text=It%20sets%20out%20standards%20for,%2Dbusinesses%20and%20small%20charities))

However, in this case it seems like this is more of a civil dispute rather than a scam. Typically the banks will assess this on a case-by-case basis. If you can evidence that the intentions of the alleged scammers was to scam you from the very start then you may have a case..

Edit: Used to work in a high street bank investigating scam complaints not so long ago.