[OJFord]

Yes, you can.

https://en.m.wikipedia.org/wiki/Garden_leave

Your notice period is about pay, not about having a desk or any work to do.

Because the access to information goes both ways - however useful it may be for you to spend a few weeks telling employees remaining what you know, the company doesn't necessarily want you learning new things.

[zimpenfish]

Yes, I know you can be required to stay out of the building whilst you're on your notice period but the post was about "cutting off your access and ejecting you from the building immediately" and I'm still pretty sure that can't happen in the UK without gross misconduct.