rear caliper sliding pins

[NCB ELAN 1991]

Having been parked up for over two years the LH rear brake is not up to par probably due to a sticking sliding pin.
Unfortunately I do not have access to a well lit workshop and have to make do with a dark underground garage.
Can anyone tell me if it is possible to check one sliding pin at a time by leaving the second one in place and simply pivoting the caliper to, hopefully, gain enough clearance?
Thank you in advance.

[dapinky]

I'm not sure if doing one pin at a time is feasible with the space available - and can't see the point in struggling, when it is not much more difficult to do both at the same time.

If you undo both bolts, you can slide the calliper off (keeping the hydraulic system attached). I then use a 5L paint can to stand the calliper on to support the pipework, and it gives enough flexibility to turn it around to get to both pins.

I use a pair of waterpump pliers to move the pins (if they are stuck!) - but you can swing a small hammer at them if needed. Once the stuck seal is broken, they should move with finger pressure - but whilst you're there, it's not much more effort to remove them, clean and regrease (silicone grease) and reassemble.