I had the same dilemma a few years ago, Ashley!
I had my first Thanksgiving here in the uk and had to cook the turkey ( 7 pounder) in our little teensy oven. I have to say I consulted my Mom but then went to Delia Smith for UK friendly measurements and details. She has a great recipe for roasted turkey on her website (ignore that it says it is for Christmas!)
http://www.deliasmith.com/recipes/r_0000001238.aspAs far as the recipe goes, I just substituted my Mom's wonderful stuffing and made my own gravy. Delia Smith's recipes are really very good, actually- she isn't very fiddly! Adding the bacon to the top of the turkey really makes it taste yummy and brown really nicely.
I found my turkey needed about an hour longer than the actual bird said on the package because I like to stuff it with stuffing when I cook it. This meant that we had to eat crisps for that hour, though- so that isn't such a tragedy
If you want more, I also bookmarked a site on ivillage on "How to cook the perfect Christmas turkey"- and just took all the info that I wanted to. People can sure make this into a far more dramatic event than it needs! I basically just used that site for cooking times and thawing times if you get a frozen turkey. I'd get fresh if you can, though!
http://www.ivillage.co.uk/food/meatpoultry/Chicken/articles/0,,164360_167050,00.htmlAccording to iVillage...
Roasting times for a turkey, stuffed or unstuffed (Jen note- I'd add more time for stuffed) and approximate times for serving....
4-5 kg: 3 hours at 200C/400F/gas mark 6; start at 9, 10 or 11am to eat at 1, 2 or 3pm
5-6 kg: 3–4 hours at 200C/400F/gas mark 6; start at 9, 10 or 11am to eat at 1:30, 2:30 or 3.30pm
6-7 kg: 30 minutes at 200C/400F/gas mark 6, then 3 ½ – 4 hours at 180C/350F/gas mark 4; start at 8, 9 or 10am to eat at 1:30, 2:30 or 3:30pm
8-9 kg: 30 minutes at 200C/400F/gas mark 6, then 4 ½ – 5 hours at 180C/350F/gas mark 4; start at 7, 8 or 9am to eat at 1:30, 2:30 or 3:30pm
These times are approximate, depending on your oven and how often you open the door to baste. Weight is the total weight, including any stuffing you may have used.
How do you know when it’s done?
Insert a skewer into the thickest part of the thigh. The juices should run clear with no sign of pink. If you’re at all unsure, return the turkey to the oven for another 30 minutes.
Resting
Once your turkey is cooked, it’s important to let it rest for at least 30 minutes or longer. This gives you time to finish roasting the vegetables in the oven and any other last-minute jobs. Cover it loosely with foil and keep in a warm place. Strain the juices and add to the gravy.
Hope this is helpful!