Does anyone know if the lockdown involves a closure of the borders?

[MsMooi]

It doesn't look like so though.. but how if they ban the travel of private car? My mum is flying out of the U.K. on Saturday..

I don't know but I'm panicking a bit as my elderly mum lives in NI and I'm in England and I'm worried I might not be able to get to her if she is ill.