On subject-verb agreement involving collective nouns, I have read that BrE follows notional agreement, whereas AmE follows more grammatical agreement. For a long sentence, after the first noun, AmE sometimes switches to notional agreement.
I found BrE practising such a switch in a BBC report on 19 March 2021.
The French airports Authority has said it is doing its best to help the Algerians, although the group are not their responsibility. (source)
Are such switches common in BrE?