When it comes to end of tenancy cleaning, I would recommend Cleaning Domestic Cleaners. As a land lord, I tend to have my places cleaned lightly before the tenants move in, just to ensure that the dust has gone should the place have been left empty for a few days. They always work fast, which keeps my costs down and means that I can keep running my letting business in an affordable manner. I would suggest that these guys are a great company for anyone who is leaving a tenancy as well, as they will certainly keep the land lord happy with their cleaning!