Why on earth would we (re-)introduce new phraseology that would only be used in the UK? Are we looking to become even more non-standard than we are already?
I'm sure Russian ATC would love to have remained using metres as the unit of level, and US ATC to have remained using 'position and hold' rather than 'line up and wait'.
Is it really that bad? We should be looking at more standardisation across the world, not less.