Go to a few local shops that take your c2w scheme (check with your HR team) and make a shortlist, sit on them for size. Be aware stocks are very low and prices high. in normal times there would be a hundred or more bikes that meet your 2k roadbike spec!
Is this your first roadbike?
if not, what size is the current bike? At 5’11, probably an ML in the suggested Giant, a 56 or possibly an L in another brand, there’s little to no consistency in how manufacturers label the size of their bikes.
2k is a fair amount to spend on a commuter bike, so check it takes mudguards as it’s wet in Glasgow and mudguards will help to keep you and the bike a bit less mucky and components will last longer
if you’re not planning on racing, a ‘gravel’ bike would make a good commuter/do it all bike