Two successfull transactions were made to two user:

For user Exparos 10GBP: http://prnt.sc/d5o77z

For user Betterlife 27.8GBP: http://prnt.sc/d5odwi

I sent funds upfront to both users and still waiting them to send my BTC. I will inform how it goes.

Esparos says he is having problem with 2FA of coinbase. This sounds like a scammer excuse, we will see.