Appreciate availability will be an issue this year and any year weather may not be conducive. but setting that aside....
Have you stayed in a UK hotel with a lovely outside pool? Preferably one you can have a proper swim in, not just a plunge pool? No children with us so doesn't need to cater for them.
Generally stay in hotels around £100 per night (per room) but given how much we've not spent on holidays this year and last, would go up to £250 for something special for the odd night.
Thank you