I outweigh you by a bit, and I have a Raleigh (which I believe is a UK brand - so more likely to be available there?) comfort bike, which cost about $400. I did have to replace the rear wheel with a stronger rim (another $100-$150 or so), because I kept popping spokes on the stock wheel. If your roads aren't perfectly smooth with no bumps or potholes, I strongly recommend upgrading the rim on your rear wheel, and being sure the spokes are properly trued and tensioned to avoid problems and headaches down the road.