[reaperducer]

The TV personality withdraw money from his Coutts account and fell below the minimum balance requirements needed for an account with this private bank

From what I've seen on the news, the account balance issue was an excuse that Coutts came up with later, after it was revealed that he had his account closed because "his views do not align with ours" or something similar. There was a leaked email or memo or something with that information.

Edit:

According to what the Telegraph says are minutes of a meeting of Coutts' wealth reputational risk committee held on November 17 2022, they read: "The committee did not think continuing to bank NF [Nigel Farage] was compatible with Coutts given his publicly-stated views that were at odds with our position as an inclusive organisation. "This was not a political decision but one centred around inclusivity and purpose." He also said there was a perception that he was regarded as "racist and xenophobic", which he called an "appalling slur".

https://www.bbc.com/news/uk-66240298

[NeoTar]

One important aspect though was that Coutts is part of a larger banking group, who offered Mr Farrage a chance to open an account with Netwest, another bank in the group.

So it’s not that they refused him service totally and he was unable to obtain a bank account anywhere, which is in my opinion an important distinction.