As no one else has replied I would use 20mins per pound plus 20 mins Around 4 1/2 lbs, just under 2 hours at 175c a bit less in a fan oven. My judgment is different it’s a whole Turkey said to be 28 lbs (probably 24)
Now that we have 3 instead of 8 for Christmas dinner, I am splitting my (extra large) turkey crown in two and giving the other half to my daughter to cook. Any advice on the timing for this? I have buttered and seasoned and layered streaky bacon over the top and wrapped it in foil ready for her to cook on Xmas day. The halves weigh a little over 2kg each. Thanks.