Banks, money transfer

Hi Guys, so this is a long one. A friend (friend A) of mine paid a ticket for me, it costed £80. He paid for both mine and his. This was 1 month ago. I asked my parents if I could go, and they both said no. But my friend keeps asking me for the money.
I found another friend (Friend B) who said that he could buy my ticket from me, and pay him.
Seems ok so far... But A refused for B to transfer him the money. He wants me to transfer the money. But I don't want to let my parents know that I have transferred £80, because reasons.
So I want to open up a bank account temporarily, so I get the £80 from B, and then transfer the money to A.
Is this possible, or are there any better ideas. I am a uni student, living very far from uni, so giving money by hand is out of the question.
Thanks for reading, TL;DR, A bought £80 ticket, parents refused, B offered to pay, A said I should pay, I don't want my parents to know.