Well some of the waiting is over. The Department for International Trade reckons that an ambitious and far reaching deal with the US will grow the UK economy by as much as 0.16%.
By my crude maths that means we only need to find 30 more equivalent pump-priming deals with the rest of the world to compensate for the 4.9% hit (UK Treasury calculation) the economy will receive as a consequence of a Canada-style trade deal we are seeking with the EU.
Obviously if we walk away as we are threatening and go for what the Government is ridiculously calling an Australian-type deal (Clue Australia has no deal with the EU and trades on WTO terms) then the hit goes up to 7.6% or 48 countries with equivalent amount of trade to that we are seeking with the US.
The Government's answer to this was to rubbish its own calculations on the basis that they were made by the previous government. Wait and see what "alternative facts" they come up with I suppose.