Hi Steve,
If it's a non metallic I'd go with Clearkote Vanilla Moose Wax @ £12.99 and a few layers of Clearkote Carnauba Moose Wax @ £15.99. This will give a really deep, rich glowing finish.
If it's a metallic and you want to keep good clarity to let the flake pop, then I'd go with Prima Amigo Polymer Glaze @ £12.99, folled by Prima Epic Sealant @ £15.99.
You can add extra steps such as a sealant into the middle of the first option to increase durability (as Gaz has rightly mentioned), or you can add a wax onto the end of the second option to give a wetter appearance on top of the sealant... If your keeping the car tip top frequently though, I would save the money initially, and add products as you feel you need to at a later date.
The one thing that may be worth considering is a quick detail spray such as Clearkote Quik Shine @ £8.99. This is a great product for a quick once over if the car doesn't need a wash but you want to give it that little something extra. It adds a good shine of it's own but doesn't really add any extra protection..... Very handy for bird bombs as well!
All the above prices are pre discount of 10% by cheque or 6.5% by Paypal.... Drop me a mail if you need any help.
Cheers.
Alex