Likewise on the drainpipes (Barry), mine have been there for 4 years now, one of the best value alterations I've had done.
Shutters for rear patio doors (main bedroom) should already be on as standard.
If you mean front patio doors (lounge) then i had an all in solution fitted which also included sliding flyscreeens (which are inside the roll down shutters when they are rolled down). Fitted by Kevins Flyscreens, been up for 3 years and again working fine, look the part.