I am connecting my Monzo account but it seems to fall over after I have confirmed that I want to allow quick books access on my Monzo account

I can help you with connecting your Monzo bank account successfully, @pascalhersey-hot.

A regular browser's cache stores temporary internet files from your browsing history. However, as it collects too many files, this may cause performance issues in your account. This can be the reason why you can't connect to your bank successfully.

I've got some steps to help fix this issue. First, you'll have to sign in to your QBO account using a private browser. This helps isolate the issue since it doesn’t store data in the cache. Here are the following keyboard shortcuts: 

• Safari: Command + Shift + N
• Mozilla Firefox: CTRL + Shift + P
• Google Chrome: CTRL + Shift + N 
• Microsoft Edge:  CTRL + Shift + P

Here's more information on how to clear cache and cookies to fix issues when using QuickBooks Online. You can also proceed by using other browsers if the steps above don’t work.

Check the following article to know more of what you can do if you don’t see your recently downloaded bank transactions in QBO: Open Banking connection errors.

After pulling up or getting your bank transactions, you can now categorise and match online bank transactions in QuickBooks Online.

Stay in touch if you need further assistance in connecting your bank account. I’m always glad to help in any way I can. Take care and have a great rest of the day!