I realise I'll get an answer in the morning, but just posting in case anybody has any insight as I'm panicking a bit.
I went into Natwest today and transferred a substantial amount of money via CHAPS. This evening I checked my mortgage account and the money isn't showing, so I checked my bank. The money has gone but it doesn't have the usual CHPS code, instead it says ITL, and the reference is letters and numbers with no relevance to the account I transferred to. Also there is no debit of the CHAPS fee, which normally shows straightaway.
Just called Natwest. They were confused why it was showing as ITL (international) but the Chaps team have gone home, so I've been told to call back in the morning 😫 She said it should be showing on my mortgage account though, as I paid it before 3pm.
Please someone put my mind at rest that my money hasn't vanished ðŸ˜