I am such an important person that Morrison's have asked me to do my shopping there. I might even quote for the windows too.
If you want to know how to supply window cleaning quotations for supermarkets, I will be running a seminar in Sainsbury's café 6PM - 8PM on February 30th, 2016 - possibly in Chepstow if someone will pay my bridge toll. Bring a packed lunch and £25 each to pay me for the information. In return, I will buy everyone a doughnut for pudding.