Having a clear out and found my Fastchip RSTuner. Never actually used it on my Meg but had it for my 197 before (used once to map it) It has the optional obd2 support module . You will need an unlock license and map to suit your car from fastchip. £35 delivered
Sorry - can’t seem to edit the original post now. Looking at the license and map cost. £35 delivered seems about right. If someone can edit the original post I’d appreciate it!