I am all for giving Luke his shot at LB if Foxy isnt fit.
As already stated, JWP was given the opportunity as Corky is injured and has given NA a great headache when he is fit to play again. No reason why Luke shouldnt be the same
If we do not blood these youngsters then there is no point having them in the forst team squad and they will quickly get disallusioned and move on to clubs where they will be given a chance
Also, if Luke plays against Arsenal he will probably be up against Theoso physical strength is not required as Theo falls over if the wind blows too strong, it is all about pass and Luke appears to be pretty damn quick and would probably be more suiterd than Foxy who isnt the quickest