Any options broker will do this when you set up an account,give options direct a try unless others know cheaper brokers,the fill price is important and I often get fills between the spreads so a good broker is worth slightly higher commisions,don't just say but xyz FTSE option as you will probably get an awful price (fill) especially in the uk
You need to be aware of the volatility and time premium you are paying,which month to choose and why,don't want to over complicate things for you but reading a couple of good books and watching an options training video will clarify many things as well as explaining in detail a number of interesting strategies if you would like some recomendations just ask and I'll post details.Good trading Zulu