I would lose the ref to being in business since 2007,some peeps may think you have limited experience.
"J & A Cleaning Services is an established,family run business based in East Anglia" sounds much nicer.
You also say-"Rinsing and cleaning the carpets from residues",that doesn't make sense would read better dropping the residues bit.
You could be losing out a lot with the 25% reduction for empty properties,if you gain a lot of work from letting agents or landlords they will happily pay your full price for a good job as it is charged to the outgoing tenants anyway.

On your window cleaning section you say "How does it works?",need to remove the S.
John