this is view UBS in FT today- SEVEN REASONS TO SELL £
"First, the rest of the BOE Monetary Policy Committee is unlikely to join Andrew Sentance in voting for rate hikes.
Second, the beneficial impact of last month’s Budget has now been priced into sterling.
Third, the scale of the budget cuts forecast for the next four years will undermine growth.
Fourth, exports can’t be relied upon to take up the slack
Fifth, the MPC remains willing to resume quantitative easing if the economy weakens
Sixth, tighter fiscal policy and looser monetary policy can result in a much weaker pound as occurred after the 1981 austerity budget.
Seventh, other major currencies like the yen have also experienced prolonged weakness when fiscal policy has been tightened during times of economic weakness"
Add to the above-
1. The dynamics of non consensual coalition politics
2. And/or why assume planned budget defecit policies will/can be succesfully implemented (eg: public expenditure cuts)