Topic

I suspect the answer is no but it is worth asking.
Can Pscan establish if the engine map installed in the ECU for a MGTF 135 has ever been upgraded?
I doubt it will tell me what the map is but it might interrogate that ECU to see if it has been changed since the car was produced.

if you use the read map feature in pscan MEMS3 and then send the file to SAWS Tuning then they will be able to tell you

In doing that what is the risk of deleting or damaging (altering without intention) the map itself please?

I think that the read map feature is risk free.