To be fair all approved turbine oils contain TCP not just Mobil Jet 2, and it is one of the isomers of TCP that actually causes the problem not TCP itself.
Just a small point, I agree that Tornados run on OX 26 but Mobil Jet 2 is approved to OX-27
OX 27 is the joint services designation for turbine oils and several oils are approved to this specification (Def Stan 91-101) including Mobil Jet 2, BPTO 2380 and ASTO 500.
OX 26 is the joint services designation for oils approved to specification (Def Stan 91-100) including BPTO 25 and ASTO 555.
Higher load carrying oils such as OX-26 are required for the RB199's

When I started my apprenticeship we had no gloves, in 1953. We plunged our hands into used engine oil, and new oil. We ran mercury through our fingers even when we had cuts in the skin as we didn't know the risks.
We breathed in PVC fumes. Wow, we must have been tough! Or daft!

Getting home after work I washed my hands in neat Domestos (bleach) mixed with washing machine powder to get the ingrained dirt out, before I went out courting. It was difficult as the fumes were overpowering. Severe cuts in the skin healed very quickly and I put that down to the bleach. Didn't medics use bleach and water to treat severe burns in the Korean war?

How true.
I started out at a big engine company in Derby back in 1969. Thought nothing of using the old tric degreaser, acetone from the labs, kero, no gloves or eye protection. At least we had clean overalls every week.

So what happens when OM15 and OX26 are mixed in a RB199 ....

I bet you rode a bicycle without a helmet and when you went for a drive in the familey car, you stood on the front seat, right between your mother and father. How did we ever live to get as old as were are.

I remember washing my hands with MEK everyday before leaving the shop. Dried them out a little and turn them white but left no lasting effects. It was the only thing that would remove the sealant and grease. How, its been banned, I guess because it worked.

If you mix OM-15 and OX-26 by mistake you're in big trouble and would need to drain the engine and re-fill.
OM-15 is a mineral hydraulic fluid and OX-26 is a synthetic turbine engine oil and never the twain should meet.

Also works with coke bottles.... great fun on night shift.

Have used latex gloves in past during car oil change.
Having fished the sump plug from the bowl the oil was being drained into, i then removed gloves to find my hands were slightly greasy.
With diesel oil it seemed to act as a filter for the black matter.