what smartd said is true. But what sort of loan are you looking for ?
personal loan ? probably get a better deal here.
car loan ? also u can get good deals here dunno about the UK though
mortgage ? i would stick with the a UK bank from what i have seen mortgage loans here have alot of catches (they mortgage the price of the property based on value from developer rather than purchased value) and other shady things ..
hope this helped .. but disclaimer i am not an expert in banking or anything