URGENT HELP NEEDED Mortgage may fall through

Please can someone help. Accord mortgages are asking for further evidence of earnings (mid year assessment) They have had two years P60s and 3 months bank statements showing pay going into my account. They weren't happy with the payslips that my employer provides, probably due to the fact its a small company I work for and they aren't as official as larger companies.

I have spoken to revenue and customs but they say they have nothing they can provide??

What can we do? Evidence do we need? Whats the form called.

Really stressed as I am getting no where with officials at the moment.

Thanks in advance