Bit of a long story.
We've sold our house. Hadn't looked at any houses before this as we werent sure how long the process would take in this Market.
It actually sold very Quickly so off we went to sort our mortgage.
We got our mortgage promise, credit checked etc with a print out of the certificate. All well and good so far!
Went to view houses. Fell in love with one and put an offer in which was accepted.
However, now we've gone back to organise the survey etc for the house it turns out the person who processed our application 'forgot' to include us having dependants despite them being in the room! 
So, we are now 25k short for the house we fell in love with :(
Now everything we look at will be compared the this house :(
To make things worse our buyer is now really putting the pressure on to find another house.
Starting to feel panicked but don't want to buy a house and regret it later!
Is there anything at all we can do with regards to the mortgage application being mucked up?
The annoying thing is the repayments on new mortgage is actually the same as what we'd paid for the past 5 years because the bulk of the mortgage is out of the fixed term and only 2.5%!
Help :(