BA might give you the status anyway if you are that close, although you'd have to ask - there always has been a bit of discretion if you are very close, like within 20, 30 etc tier points.

However, with the reduced tier point thresholds, they might have zero discretion now.

Call/e-mail them when you are at 1,120. Worst is, they say no, they can you decide whether to go for those extra TPs