IIRC the licence costs ~£250. A remap by the same tuner will probably cost you about £250. A remap by a different tuner, as they cannot read the original tuners map, should cost ~£300-350. Although, some will charge more.
sorry marky but your wrong, i rang up today before buying a second hand flashed ecu, and i have to say it's a good job i did as the licence is only worth 100 pounds yes that right there is 100 pound price difference btween having a ecuteked ecu mapped or having your own ecu mapped,so a complete waste of time buying a preflashed ecu as your are not gonna save a great deal unless you get it for free lol