Originally Posted by
ciderman
If it was in 2 boxes, what are the options as per original query?
The maximum size of each item is 190 cm x 75 cm x 65 cm, so even your original size is OK (assuming you meant mm). If, when you repack, either box is over 90 cm x 75 cm x 43 cm, then it'll be out-of-gauge and you'd have to go to the oversize bag drop.
BA's website says the minimum time for this is 90 minutes before departure, so a bit earlier than the last bag drop for normal bags. But if they're within the standard size then I think that any bag drop should be able to take the boxes together with any necessary payment.
Obviously you'll still be subject to possible charges for extra bags if you're beyond your included piece count allowance, and for overweight bags if either box is over 23 kg and you don't get overweight bags for free.
And you'll need appropriate levels of courage to consign a dinner service to T5's mechanised baggage system.