Flymo made their name from their hover mowers which ride on a cushion of air.
At the bottom end of the current Flymo range is the 28cm Flymo Micro Lite hover lawn mower. Powered by a 1000 watt electric motor the Flymo Micro Lite uses individual easily replaceable plastic blades. User reviews on the Test Freaks web site rate the Micro Lite 9.0 out of 10.
UPDATE: I see Tesco Direct are currently selling the Flymo Micro Lite £5 cheaper than I can find it elsewhere.