I'm not in the UK and we've been doing this since September. We are in a well-funded district -- meaning school breakfasts and dinners, a laptop, and internet access has been provided to everyone across the school. The state has also provided child care credit for families who need to work outside of the home and there is a paid provision for time off due to caring for children in virtual schooling written into the unemployment here. It's not much, but it's something. It works here due to the small scale; I don't think it could scale up effectively, which means no, I don't think it would work in the UK.
Blended learning is not ideal, but it has limited community spread and avoided the school-wide shutdowns we've seen in other towns when cases rise. Other towns have lost staff to covid or had to close down due to the number of staff who have become ill; we've had a small number of isolated cases which could be quickly traced and quarantined, along with the limited number of contacts in the school each week. Far easier to tell ten people they need to isolate than the whole class.
It is not easy to balance as a parent; my DC are 10 and 7 and my younger child needs supervision through the day, but DH and I take it in turns and we both have jobs that are being incredibly understanding about the need to be flexible.
Some children have clearly taken to it and some have not. The schools have struggled with the provision of services for SEN, OT, etc. and no one as far as I can see has hit on a real, workable solution for that. The calibre of work expected is no less than a normal year, and the teachers in our district spent the entire summer training to deliver remote instruction they have had to become masters of student engagement and curriculum structure (I think DS's Y1 teacher deserves a medal, honestly) to keep students focused and making measurable progress. The teachers are expected to work with the students attending in-person on that day first, then work with the remote students the district assumes a parent will assist on those days. The ability to work in small groups with the teacher has actually been incredibly beneficial; my DS has improved remarkably in some of the subjects he struggled with earlier.
So from the trenches, no, it's not great, but our community spread didn't jump upwards when schools opened like some other towns, and the staff is safe. I'll take it.