Are you certain the fix compromises the safety of the vehicle? If so, could you tell me your source of reference.
I was told by JLR that there were no comprises to safety.
you did mean compromise.
post a letter from JLR corp person and then i will believe that someone from JLR is BS'ing you.
what i do know is this. using a hammer & chisel to force open the spot welded seams of body panels is not a design item, nor is drilling or grinding out factory welds and then re-welding with a MIG, all done by various service depts, without any specifications on how to perform the work, just bang on chisel, clamp here and there then MIG here and there !!! all of this is not as designed.
i will also challenge that even a letter from JLR or TATA is worthless unless JLR can show proper safety testing using random DS's that have had this hack work done to them.
i myself have been welding TIG and MIG for years now, i am good at it, but any weldor will tell you, no two welds will be the same when done manually w/o the strict controls used with robotics.
bottom line is this, the service bulletin prescribes things that are outside the actual design, and being done manually by different people using different machines and different techniques. this in-and-of-itself should tell anyone that doing such takes the vehicle outside of the original design, and thus you have compromised the safety of the vehicle.
but then again, show us JLR corp letter along with the testing results, i will then retract my statements.