What are the consequences, of giving someone your email address and a copy from your passport?

Yep. That's a variation of the Nigerian prince scam. What are the consequences? Really?!

The perpetrators will (and most likely already have) stolen your identity and opened copious amounts of credit cards and loans and will not pay them back. You WILL be saddled with the unpaid bills as the credit mongers will try and get you to pay the unpaid loans and credit card bills. This will crush or kill your credit score.

They will possibly create fake passports and give them to criminals and/or terrorists allowing them to enter other countries 'legally' so they can further commit their criminal activities.

All this because you were gullible and unabashedly GREEDY.

Inform both the Home Office AND your bank(s) of your silliness straight away, just in case attempts are made to obtain a new passport or application is made somewhere, using your disclosed documents.
Nowadays there are national computers that record these type of attempts and if your passport number has already been put "on alert", these buggers may be caught or thwarted or both.

If you ever give out personal details again, I shall smack your bottom.