VCM / GNA-600
Teradyne VCM (aka the GNA-600) is the key to performing diagnostics & programming on older model Jaguars and Land Rovers for that matter.
The only device compatible with JLR IDS up to V124, the only device that can flash the AJ26/AJ27 PCM (unless you have an old WDS) and the most reliable means of flashing modules in JLR vehicles.
We often manage to resurrect a bricked module using the good old VCM and IDS.
These units were discontinued more than a decade ago, but we are still using them, and if you need one, we might be able to hel, at least with cables if not a complete unit.