Well after a small but required service on the car I had to reset the…
Reset the service light on a 2002 Rover 75
There are 3 stages
locate the obd plug and find pin 8 then
turn ignition to pos 2
with a fused wire ( a piece of wire with a fuse in it)
ground pin 8 for 4-5 seconds
turn ignition off
repeat this procedure 2 more times but for 8-12 seconds and then the service indicator will be reset.