I'm keeping an eye on allocations/changes for BA283, as I'm booked on this (currently new F) at the start of May.

Until mid-April there's some variation in what's allocated, but from then onwards it's booked for 8F 777-300 pretty consistently. Whether that remains the case is another matter!

From a personal perspective I'm not sure what's preferable - it'll be my first time in F and logically I ought to want a refurbished aircraft, but equally I'd quite like to try buddy dining with my other half while it's still possible...