There are a few invoices/receipts that, from the brilliant advice I have found on here so far, I am sure will get rejected by HMRC. For example, lighting bought from BHS before they went bump (and then got reincarnated with a different company and VAT number) for which I don't have a proper VAT invoice. Or where all the required information for a VAT invoice is there, but it just says order confirmation on the header, even though I have asked for a VAT invoice. Would you leave them in and let HMRC reject them, (even if there are a lot and I don't really want to wind up the poor soul going through our 456 invoices on our claim), or just take out most(?) of them to get a quicker turnaround.
To put it into context, the total reclaim is over £17,000 if I leave them all in, or £15,500 approx if I took them all out.
and a word of advice - don't do what I have done and leave it all to the end. The sooner in your build you set up a good system the easier it will be in the end