UK commercial property out performing US commercial property sector ?

There are some alarming figures for the US commercial property sector being bandied around, some say that US commercial property values are at a seven year low. There has also been talk of office rentals having hit average occupancy levels of as low as 80%.
So when there are such strong signs of recovery in the UK commercial property market, and signs of property investors bullish about the returns from the UK commercial property market. How long will it be before the UK banks start to look more favorable at lending on property development ventures and speculative property development funding?