Signing Bonus and Relocation the same?

Hi

I received and offer from a BB in London. In the contract it was mentioned a relocation bonus of $7-9K, but nothing about signing bonus. Is this the equivilant of signing bonuses, or do people normally receive an additional signup bonus in addition to the relocation payment? Would it be possible to contact HR to attempt to negotiate a signing bonus?

P.S. it's a full time offer and I have not yet signed. I realize it's a bit of a stupid questions, but don't rly have many friends/connections in international banks so don't know if this is something ppl negotiate on ( since the base salary is fixed for analysts)