Here's another funny example where a UK MP was not able to vote the way they intended: https://www.independent.co.uk/news/uk/politics/snp-mp-locked...

Here, it's suggested that MPs sometimes vote both ways to cancel their own mistake out, although they normally claim that they are taking some nuanced view: https://www.publicwhip.org.uk/boths.php

Not to mention that UK MPs can't vote if they have to be absent for any reason - for example if they have child-care duties.

Your original point was that the UK Commons' system of slow voting is foolproof: it isn't.