for the Piccadilly Line upgrade. And performance of the current Northern
Line trains is dire so it would be doubly stupid - Tube Lines will want

I thought the northern line trains were pretty reliable. Unless by
performance
you mean acceleration in which case I'd agree , they do feel (as a
passenger)
to be powered by little more than a rubber band. Farcical when compared
to
the acceleration achieved by the older 92 stock on the central.

B2003