I would like to put in some made to measure roller blinds, but I really want them installed as my windows are large and I don't trust my measuring. In addition the bigger the window the bigger the error. Can anyone recommend a firm - I am London based. Hillary's didn't inspire me and John Lewis had a very limited choice. I want Linen look - natural brown paper/digestive biscuit colour or lighter. Any recommendations? Many thanks, Ludmilla