Can somebody recommend a health spa in uk or europe which is child-friendly?

Our two boys will be 20 months and two months in september, when we plan to go somewhere relaxing for my 40th birthday. does anyone know of anywhere that has a suitable creche/kid minding service, and where kid ren are welcomed than treated as an irritation?
Answer
Yes ickworth manor in suffolk is just great. our children are 4 and 2. . they have nice food and child care. aswell as a pool and beauty centre. we had a great break and it is set in suffolk countryside as part of a national trust property. ickworth is part of a chain of child friendly hotels.