Binance accepts first deposit of GBP fiat but returns any subsequent deposits (UK)

I’m a UK resident with a verified account in Binance.com. I used it a few years in the past to buy and sell some crypto and haven’t used it till now. I used to do bank transfers from/to NatWest however now Natwest blocks any transfers to Binance. So I tried to switch £100 from my NatWest account to a Revolut account after which from Revolut to Binance and it labored. After verifying that it labored I then tried to transfer another £900 but that second transfer was rejected. I have tried 3 times and every time I get the cash returned to my Revolut account the subsequent day.

I have checked every part and all of it appears to be high quality. Identify matches completely in each accounts, I’m the only account holder, all the requirements are apparently met however the switch never goes by means of.

I’m unsure why the primary switch worked however not the subsequent makes an attempt.