London is an expensive place and your drink is likely to cost more than its equivalent elsewhere in the United Kingdom. Expect to pay £3 for a pint of beer in an average pub. However many local pubs, especially those run by chains like Wetherspoons and Scream tend to be more reasonably priced, the latter catering for a student audience where you can find a sub-£3 pint. In the Bloomsbury area, check out The Court (near the North end of Tottenham Court Road) and The Rocket (Euston Road); both are fairly cheap to drink in, given that they cater for students of the adjacent University College London. Directly opposite the British Library is The Euston Flyer, popular with locals and commuters alike given its close proximity to St Pancras International railway station. Classier bars and pubs can be much more expensive. However, the cost of alcohol drops significantly the further away you go from the centre (though be aware that West London tends to be an exception, with prices pretty much the same as the centre).