Nice Job fieldsy.
I love doing these type has they look really bad and most are quite easy to bring back to new again. Custy's are always over the moon when they come out and see what you have done.
Priced right as well, IMO.
My first con roof took about the same but if access is good you will get them down to about an 1 hr for roof & gutters and about 2 hrs for a full clean including all frames etc.
Why anyone would go out and charge £20 & £25 for this type of work is beyond me.