Mortgage plus cash ??

Hello

I have been to the Halifax this morning and they have offered me a maximum mortgage of 73 k on my earnings . I have a 50 k deposit so making total £123k .
However the house I am interested in is £130k would an estate agent accept my mortgage of £123k plus the remaining £7k in cash???

Are there any issues I need to know about?? I would rather pay the extra in cash and not have to add to mortgage payments

Thanks in advance