We used to do chain stores back in the 90's. Also got the MOD contract for all the barracks within a 100 mile radius. Was a good deal. The Army's number crunchers measured both sides of a window and came up with twice the square meters!! Everything is reckoned in area to clean, so a standard price on the bid and we were laughing. Kept that contract for a few years, then some huge firm called ISS from Sweden put a stupid bid in one day and got the job of course. It was pennies compared to our price and they kept the contract for at least ten years or more.
Nobody, in such a big organisation like the MOD or national banks etc really gives a toss about windows being dirty. It's just another box to be ticked by some "Manager" that is checked by some other "Manager" somewhere in "Management".
LJ Thorpe sees it like I do. Safety in numbers. Losing one or two hundred quid jobs hurts, losing one or two twelve quid jobs is easy to replace.
If you are ambitious like some of the guys on here, then it can be a problem building an empire and losing some of it. For blokes like me, I couldn't give a toss if I lose the odd shop here and there. They are all over the place. Just get out and chase the work if you want to work on national chains. People like me and LJ Thorpe will pick up the slack. ( That's only an example, not meant as written) I won't be picking up any slack, as I'm not in UK.