I got a prompt from HMRC about a tax code change - went onto the website and looked at it. I've claimed the work from home allowance which they indicated would adjust my code so I expected to have an increase and thought that's what it would be, but it seems to have been cancelled out by some other amounts but I'm clueless as to what they are for and why. I'll post a photo of what it is in the posts below.
Thanks for any help :)