Items including vuvuzelas could be banned from London 2012 venues such as the Olympic Stadium

Picnics and vuvuzelas may not be welcome at the London 2012 Olympics under a series of security measures produced by the Games organisers.

Families and sports fans will not be allowed to take flasks, thermoses and a feast of food to the Olympic venues.

They are included in a “non-exhaustive” list of banned and restricted items in the terms and conditions of booking Olympic tickets that went on sale this week. All bags will be scanned by x-ray machines as part of security.

Mobile phones are not welcome because they may disturb the action along with banners, horns, whistles, drums, rattles and musical instruments - so it would appear that the 2012 Olympics will be a vuvuzela-free zone.

The plastic horn provided a soundtrack to last year’s soccer World Cup in South Africa.

Fuller details of banned items are expected to come with the arrival of tickets for the different competitions.

Liquids in containers that are bigger than 100ml, camera tripods, flags of countries not taking part in the Games are also on the hit-list along with umbrellas, which could be used as a blunt instrument.

The rules are part of safety measures but also aim to help safeguard the official sponsors of the Games that is costing London 2012 £2 billion from the private sector to stage.

The rules intend to ban “objects bearing trademarks or other kinds of promotional signs or messages (such as hats, T-shirts, bags, etc) which Locog (the London 2012 organisers) believes are for promotional purposes”.

An ambush marketing stunt at the 2010 World Cup, featuring 36 blondes in orange mini-skirts to get publicity on the cheap by a Dutch beer company, led to arrests.

London 2012 said it had laid down a “base case” set of terms and conditions.

A spokesman said: “In many cases, decisions have not been made on what will or will not be allowed into venues. When tickets are issued the final terms and conditions will be made clear to ticketholders.”

Mobile phones will not be banned but their use may be restricted at certain events such as archery.

Small amounts of food might be allowed in but large picnic hampers will not, and bringing liquids into venues is “under discussion”, he said.

Free drinking water will be available at venues.