The 2’s will be old stock, so be careful if you buy these. They stopped making them in 2016 but some tyre companies are still selling them as “new”.
Thanks J.
I've decided to run with the rears as actually they have a shade under 4mm grip and that may well last another 12 > 18 months for me these days. They are in good shape as well.
I can get all four tyres for a good price but it's a waste to launch the rears now.
I will bear that in mind!