Phil Vickery's Turkey on "This Morning" changing size of turkey?

[onethatgotaway]

I saw this method of cooking the turkey on this morning, where he part steamed a 10lb turkey in a roasting tray with vegetables, wine, stock and water for 2 hours under tin foil @ 180c then browned it off with a glaze for 20 mins. Anyone have any idea how long this would have to be cooked in this method for a 16lb turkey as it looked really nice. You could use the juice left for gravy. Thanks for any advice!

Additional Tips

Hi, I found this on Phils website from a few years ago it seems to be the same recipe:) Hope it helps with the maths!!

The recipe I did on the show was for a 5kg bird.
For a 8kg bird I would steam it for 2 hours and 30-45 minutes,and then brown it in the same way.
For a 10-12kg bird I would steam it for 3 hours and 45 minutes, and then brown it in the same way.
Please remember that times will depend on each individual oven, but the most important thing is that you seal the turkey well (use a tin with a lip) with foil so that you steam the bird.

Thanks Chappers, that's a great help! Merry Christmas x