Getting the previous searches will definitely help in fact that's one of the biggest causes of delays at the moment.
Yes you'd have to tell your lender if you were getting a loan from family in the interim. Hard to know whether it would make a difference. Pretty much all lenders are fine with gifts from families regardless of amount but loans are another matter. It's quite uncommon (I think a lot of people do intend for them to be long term loans but they declare them as gifts so that's what we report them as) so my anecdotal evidence for loans is pretty slim. The last 2-3 I've had have been fine though so take that as you like!
Also don't forget if you do that you'd have to pay the higher rate of stamp duty to complete your purchase first (presumably this would be included in the family loan) although you could claim it back as soon as your sale went through.
If I were you I would consider approaching the lender (or asking your solicitor to do so) about this now as they can take a while to respond to these sort of requests. You can always backtrack later if you don't need the loan, but you don't want to be asking it for the first time right before the deadline as they are going to be inundated.
Thanks for your input.
Yeah I'll ask my current lender. Does my solicitor need to ask them at this stage? I'd have my current house fully paid off.
Good point re the 2nd purchase stamp duty, would just need to consider the cash flow element of that.
They'd be OK with identifying to lender its a gift.
Thanks.