Linux doesn’t really know about drives, it knows about partitions and mount points.
Obviously this is a simplification, but in general it’s close enough. It also could well be your problem - timeshift doesn’t know or care that /boot is on the same physical drive as the rest of your system: if it’s a different partition, it’s separate.
I enjoy Sara Cox’s evening drivetime show. I sometimes wish I didn’t, but when you’re doing yet another 4-hour slog up the M1/M6 in evening rush hour traffic it’s perfect company.
And Zoe Ball can be OK in the mornings, although I’ll often tune into something with a bit less chatter unless I’m feeling particularly enthusiastic. Other than those two shows, R2 doesn’t really do it for me. And yes, Jeremy Vine is utterly off-putting.