sorry to hear that marcus. I hope it works out to your advantage. Funnily enough, quoting my local tescos for you made me compare it against my domestic work and it seemed alot of hassle. With domestic there is very little hassle. No chasing the clock or negotiating traffic problems.
I have spoken with a mate who's mother runs a cleaning company and they have several grands worth of wc work. I would love to do some of it but when we spoke about it in the past the deal was for me to employ someone to work my round and i take on all their wc work myself. I'd basically become a slave to the clock and lose control of my own destiny. So i declined. I'm still hopeful of grabbing some work off of them though.
But well priced domestic work is hard to beat.