Update:

Skewers for front and rear tyres installed fine with only the front one being slightly too long. Rear skewer is a perfect fit. Left off installing the Disc Brake bolts and will instead let the bike shop bit those when I get my free 6 week service in 5 weeks time.

Ahead stem and saddle post bolts were easy to do. All bolts/skewers were throughly greased as per instructions.

Oh, one problem with having the skewer too long is that I was unable to stick the lever into the pit key for "1 - 1.5 turns" once I was unable to turn it any longer by hand. Luckily the Pit-Key is shaped in such a way that pliers were able to grip and twist it without too much effort (i.e. no risk of deforming the pit key).

Thanks for the advice everyone...still a bit anxious though about the wheel skewers and will therefore be keeping the pitkey, pliers and allen key on me at all times to double check the skewers and bolts before each and every ride.