Can anyone recommend an overnight spa break for 2 in/near to London?

[JudgeBooby]

I'd like to treat my partner to a break, but looking online is overwhelming my poor brain cells! If anyone has any recommendations to get me started I'd be most grateful!

[dailyfix]

Pennyhill Park in Surrey is gorgeous
Chewton Glen is Hampshire, amazing but further out

[JudgeBooby]

Great! Thank you, they both look amazing!