Is it okay to travel to the U.K. while waiting for a Non-O Marriage visa extension approval?

Thanks group! So far you’ve been invaluable. Will post my full experience soon. But….

I’m waiting for my 90 day Non O - to - Marriage visa extension to be approved. I’ve done everything, post 45 days immigration office visit. Then, my home visit 7 days later… etc.

My decision date is mid June. .. but, my mother is very unwell, she has dementia, sadly. So I need to fly back to the U.K for 5 nights next week. I’ll buy the re-entry permit that I’m required to of course, and I’ll be be back in Thailand at least 10 days before my immigration appointment for my marriage extension conclusion.

Is this ok?

Any advice will be very much appreciated.

Dom