Tags: #drawing, #pattern, #illustration, #landmark, #architecture, #bridge, #building, #London, #Tower Bridge, #sketch, #architectural details, #architectural patterns, #Adam Regester, #digital illustration, #London Illustration, #London Cityscape, #London Souvenir, #river thames, #architectural, #London gift, #london style, #ipad drawing, #traditional architecture, #architectural sketch, #repeat pattern, #architectural drawing, #period architecture, #ipad illustration, #Famous landmark, #London landmark