British academic english: 'which-that'

Hi. I'm reading about the 'which-that' issue concerning non-restrictive clauses in academic British English. It seems that in British English there is no need to differentiate restrictive and non-restrictive clauses using 'that' for the former and 'which' for the latter, as in American English.

For example: 'One question which arises is whether this is relevant for writing or not.' (Instead of 'One question that arises...')

Moreover, it seems that 'which' is considered more formal than 'that', which makes it a better choice for academic writing.

Reading academic papers written by British people, it really seems that they follow this 'rule'. However, in some cases they employ 'that' also for non-restrictive clauses.

What do you think about that? To write in academic British English, is using only 'which' for non-restrictive clauses a nice choice?

Thank you!!!