@shytorque, yes I knew there was no helicopter landing at LCY, not much space to play with I presume.
The quote I have in has a landing spot at Royal Albert Docks.
@SilsoeSid The RIB quote I have requires a start from North Greenwich. I am not sure the pier at Excel is readily usable - working on that.
@nowherespecial I agree the Rib ride may be a wake up. There is a more genteel high speed option with champers and nibbles.
Thanks for the thoughts all.