Dubversion said:
is it one where you can keep the trout? and if so, do you pay by the day or by the catch or what? (sorry, i know next to nothing about this)
Most stock-ponds do a ticket for so-many hours, plus so many trout to keep - Usually something like 3/4 hrs, half-day or full-day plus, to keep 2, 4 or 6/unlimited fish. Others caught can be returned provided you take care of them (handle minimally, use barbless/minimally barbed hooks or close-up the barbs with a pliers).
Avoid anywhere that insists you keep (& of course pay-for) all you catch - Unless it is a truly wild water which will be much harder to fish anyway, they tend to be overstocked with poor-quality fish & you soon end-up racking-up a huge bill, never mind the wastefullness. Personally, two fish, a bit of walking/wildlife watching, plus a beer/coffee & chat with whoever is about is a bloody good day for me.
Another good thing about this kind of waters, is that if you are trying to get back into fishing/want a try-out is that they will often rent you basic tackle & at less busy times like this any clubs that use them often offer introductory days with tuition/advice etc for considerably less than normal rates.
Here is their website:
http://www.alburyestate.com/syon.aspx
http://www.alburyestate.com/pricing_costs.aspx (boy, they do love their rules there!

)
For freshwater/estuaries (but not the sea) in England now, you do need to get yourself a national rod-licence from the post-office before you start too. Which is pretty cheap, depending on the type of fishing & how long for. Environment Agengy website is probably the place to find details of that.