Romantic / Boutique Hotel Recommendations

[Robw73]

Chaps / Ladies,
Always looking to work on recommendations rather than gambles.

I am looking for a good hotel to whisk my new lady away to in the middle of May.
It will only be a quick weekend escape, so ideally within a 2-3 hour drive from London.

No set agenda.............. so could be a Country Retreat or City Boutique Hotel.
Quite happy to stay within London if the Hotel hits the spot.

Sensible budget, I'm not minted! ;-)

Thank you.