Boots Optical has a convenient Victoria Street location. I have previously popped in to check out their glasses selection and deals, which all seem that the selection and prices are similar to other companies in the area, although glasses can be expensive generally. Being with Boots, though, I trust the brand. Most recently, I have had issues with older glasses(that I had bought elsewhere) with the screws coming out. When I was in a bind with one of my lenses falling out when I was at work and I needed the screw to be put back in, the staff were lifesavers to get me a new screw and put it back in for me! I really appreciated them being there for me when I needed them.