Charles Stanley reiterates its 'accumulate' recommendation on Whitbread after the hotel and coffee shop operator's results demonstrated the resilience of its business model 'in an extremely tough economic environment.'The broker notes that Premier Inn's RevPAR, a measure of revenue per hotel room, was much better than the industry average.'We expect the RevPAR recovery to continue as the UK economy gradually recovers and anticipate further forecast upgrades going forward,' the broker said.