Had a reasonable amount of success over the years - but continue to search for perfection. This year going to use a large roasting bag for all but the last 20 mins (browning time ).
I shall pull the skin from the breast (get my hand in there and liberally apply butter and ,sage , rosemary etc between the skin and breast).
Next put onions, shallots , celery in the bag .Then place the Turkey Crown (In my case ) on a trivet in the bag - to keep the meat above the juices and place in oven for the appropriate time before cutting open the bag for the last 20 mins to allow to brown .
Once out of the oven cover with foil with a tea towel over the foil to rest for about 15 mins , then Bobs your Uncle .
Would appreciate members adding their tips to the thread so we can between us achieve the perfect Turkey /Turkey Crown