Best location to visit Hampton Court and easy to LHR on a Sunday morning?

London - near Paddington station for Heathrow Express if you want the easiest and quickedst way to Heathrow on a Sunday morning.

Or any car service. Heathrow Express takes 20 minutes - anywhere near Hampton Court would take longer.

Paddington is not convenient for HCP at all. Waterloo is convenient for HCP.

Are you trying to do them on the same day? One location is not going to be convenient for both..

You need to clarify what you are asking.

This is two different questions 1) Most convenient to HCP and 2) Most convenient to LHR. Not the same thing.

What time is your flight on Sunday?

On a Sunday morning I'd probably take a precooked car service to LHR since the traffic won't be an issue - - like justairports.com . Also, what else are you doing in London? I wouldn't pick a place simply because it is convenient to one site if I was visiting other attractions too.

Waterloo also has direct trains to Feltham from which the airbus takes you to terminal 4 - just a mile or so away and then the other terminals - so Waterloo might fit the (vague) bill in the OP's question.

I'd prefer a prebooked car service to a precooked one. The latter tend to be a bit soggy.

To get to HCP from London you take a train from Waterloo station to Hampton Court. Period. And if you're going with someone else, print out the voucher from www.daysoutguide.co.uk and get two admissions to HCP for the price of one.

Oops - iPad mini auto correct . . .

But a pre cooked car service might be OK too.

Maybe. Better than a prebaked one.