UK genealogy site ?

Probably star with

I tried them on trial and was quite impressed.

You only get access to the BMD indexes which tell you sod all for births (apart from the magic number to order a cert copy). The marriage index offers quite a lot of info.

One of the most useful bits IME, once you get back > 100 years, is the online census data - you can pretty much go through that all the way as the information is extremely detailed and if there's any doubt, checking the same family +/- 10 years seemed to work quite well for verification.

There are also shipp manifests and various military records there too which is very relevant for males in the WWI and WWII periods.

Yes - once you have the relevant details which the sites above will give you.

what do you want to do?

Do the research yourself

learn how to do it

get someone to do it for you?

It seems that you can

try soc.genealogy.britain - that's where all this happens

Non commercial:

Then the on-line census.

Then the Mormom church

Agreed - and

MBQ

you a shed load of money

But read all their FAQs first as a request like this made there will be met with a very terse reponse to RTFM

Depending on what you want to do freeBMD, county records offices, Curious Fox and a host of other websites with various chargable access modes are worthwhile. Ask a very specific question and if you are lucky SKS will help you resolve your problematic relatives. The name psecific bulletin boards on Ancestry though US biassed are also worth a look as it IGI. Just don't trust things unless you have seen the certificate! (even then people fib when getting married)

Oh and if starting out you probably need a guide book of some sort.

Regards, Martin Brown