The third quarter of 2011 saw an increase in TBMC’s average buy-to-let variable rate, rising to 4.10%.

According to the buy-to-let and commercial mortgage specialist’s Landlord Profile Tracking Index, the average fixed rate has also increased from 4.82% to 5.03%.

The third quarter also further increase in the proportion of buy-to-let applications for variable rate products.

Andy Young, chief executive at TBMC, said: “This reflects the weight of expert opinion that Bank of England base rate will remain low for some considerable time