Land Registry Shitshow

Selling house. Buyer's solicitor wanted letter from an architect confirming extension done in 2017 is not outside boundary (map he's using is one on Land Direct website). Land Registry map is wrong. See Maps of what we bought, what the map on the Deeds the Bank Sent to our solicitor shows (it refers to a part of the property coloured yellow but looks like nobody had a yellow crayon for that part), and map that's on the Land Registry website.

Am I correct in thinking that a) Land Registry either made a mapping error or omitted the tiny triangle somehow from our folio b) our solicitor at the time didn't bother checking that the map the Land Registry sent back to them with the folio details was correct and c) the Bank didn't bother checking that the map was correct when they got the Deeds either.

Applied to Land Reg in person for the map that's on file in their offices, very unhelpful cold and uncaring employee advised this will take around 12 weeks to retrieve.

Position now is we have to get a map drawn up, ask the Management Co will they 'sell' the triangle to us, as we can't prove it's ours until we see the original on file which will take too long to get.

All this cropped up last week throwing our conveyancing chain into chaos and nobody seems to give a f&ck! We have to incur the costs to fix it and risk losing the sale and hence purchase of new property if buyer's solicitor doesnt agree to accepting the solution.

Like how do these organisations just get away with this shit?