"Easy to trip up any interviewee. Just ask a question so specific that only the current incumbent has the information to answer."

The question was specific to Boris not to ken as it centred on Boirs's plans to reintroduce a revamped routemaster.

As Ken is not considering this option he would in fact be the one you would expect not to be informed.

His answer however was still more useful - research and development costs on their own would make the whole process more expensive.

Thanks - in the absence of an answer from Boris I have to operate according to the information supplied by ken.

"Ditto the ones who don't see through that technique....Simple!!"

... I see ... that'd be me then ... right ...

I agree ... your view is simple :-)