British tour operator Thomas Cook became the 23rd London Olympics sponsor, providing short break packages and tickets for the 2012 Games, organisers said.

The deal, thought to be worth about £20 million, will see Thomas Cook provide more than 250,000 packages including accommodation, transport and event tickets for people attending the Games in east London.

Sebastian Coe, chairman of the London Committee of the Olympic Games, said the deal would help deliver "affordability and accessibility".

Olympic organisers said last month they had raised their sponsorship target from £650m to £700m, defying the economic downturn. About £570m has been raised so far.