Vianet alert as profits look short

The company which claims to be able to measure the perfect pint left investors in need of a stiff drink yesterday after a profit warning sent its shares slumping 16 per cent.

Vianet, whose beer monitoring technology is used in one in three British pubs, blamed pub sell-offs and contract delays as it braced the City for disappointing profits. The shares skidded 19p lower to 97.5p.

Vianet expects operating profits of £3.2m for the year to 31 March, well below the previous year's £3.9m.