Flexible working request - a change to my conditions, I need some help!

[changingstages]

I made a flexible working request when we returned from WFH to office working - most staff have gone back 3 days a week but I made a request to work 4-10 days a month instead. It was accepted, to be reviewed in three months, which was going to be January.

Then the WFH directive came in so and we went back to all being at home. I'm back in the office from next week so asked what we should do about the flexible working request - have been told that we'll do it for another month and then review in February instead of January.

BUT the email confirming this says I have to be in for 10 days. Not the 4-10 days agreed originally. So... I'm not sure how to reply. Do I ask about the changing the terms of the previously approved agreement? I'm not sure quite how to approach it.

If anyone has any advice on how this should play out, legally, I'd be so grateful.

Refer back to the original agrement they accepted in writing. Forward on the last email or letter you have from them stating the arrangement they agreed to. You don't need to justify anything just factually, I will be doing X as per agreement Y attached.

If they want to review it they have to review it as per their own policy.

They can't accept it and then un-accept it without going through the proper process.

What does the policy say? Do you have a union rep?

I think they just stick to statutory policy on this kind of thing - nothing in my actual contract. It's a small company, and they use an external HR if they need HR advice. They're actually a pretty good employer and do try hard but quite often are a bit shambolic so am keen to keep things friendly, but legal, if you see what I mean!

My union membership has lapsed, which I'm very ashamed of, as I'm very pro-union - I'm going to sort that out this week. Also a good union and have been helpful in the past, but don't want to go in heavy handed either.