We use a little company called The Garden Team based in Walcote. They send a man around once a month for an hour and a half; he keeps the borders looking neat and tidy, does a bit of weeding and trimming etc. Don't have their number to hand but you could probably look it up on the internet (address is 26 brook st Walcote, LE17 4JR)
My partner is a gardener and is very good, knowledgable abd reliable, his customers are always very pleased with his work. Not sure where you live but he generally works in the Oadby / Wigston / Blaby area but also does some work in Thurnby and Melton. He is Meric Little, number is 07929 032138. He's pretty busy at the moment but worth giving him a ring if you're local.