According to a leaked document, the Labour Party is considering a major advertising and marketing crackdown. Policies being discussed include banning alcohol brands from sponsoring sports by 2020, preventing supermarkets from displaying sweets at checkouts and a 9 p.m. watershed for unhealthy food adverts. The sponsorship proposal is estimated to have a cost impact on sports bodies of GBP300m. A spokesperson for the party said these are options being discussed and do not represent policy.

London is the driving force behind a 7% increase in marketing job vacancies in the last quarter, according to a study from recruitment firm Robert Walters. In the capital, marketing vacancies have risen by 21% and there was also strong growth in the North West of 13%. In contrast, the study found that demand for IT roles and retail posts was down 6% and 4%, respectively. Robert Walters believes this has led to employers having to offer marketing executives wage increases to counter offers from other companies and agencies.

National Express has handed its GBP7m-a-year advertising account to independent agency Isobel, which replaces McCann Birmingham. The UK's largest coach operator first worked with Isobel last year on a summer project called 'instant getaways' following a four-way pitch overseen by AAR. Paul Houlding, the managing partner at Isobel, revealed that the agency will be working on "changing people's perceptions of the brand and creating a whole new generation of coach travellers."

Twitter shares have fallen to an all-time low after a 'lock-up' period ended yesterday. This had prevented early investors from selling their stock. Shares closed down nearly 18% on the day, yesterday, at $31.85. The slump is being seen as evidence of negative investor sentiment towards the social media network which has yet to post a profit and losses have widened for the past quarter to $132m compared to $27m for the corresponding period in 2013.

Forrester has been analysing the anonymous login and granular data sharing announcements made by Facebook last week and believes they will lead to less information becoming available for marketers. Anonymous login and users ticking off the level of data an app can find out about them will improve privacy if these are optional, but will have a major impact on marketers if the moves are mandatory, Forrester concludes. It could mean marketers need to use a third party for profiling audiences on the social media network.

TalkTalk has renewed its sponsorship of "The X Factor" with a new three-year GBP30m deal as Simon Cowell and Cheryl Cole return as judges later in the year. The deal is widely being seen as a sign of confidence in the show, whose last series saw a dip in ratings. "The Guardian" estimates that the television exposure the brand receives through sponsorship idents is worth roughly GBP30m at rate card and that TalkTalk also gets knock-on association benefits, including the show's tour and mobile auditions.

Starcom has been appointed by easyProperty, the online estate agency set up by easyJet founder Sir Stelios Haji-Ioannou, to handle its GBP5m-a-year online and offline media planning and buying account. The company said Starcom's 'innovative ideas made them a natural choice for us.'

Amazon has taken convenient online shopping a step further. Shoppers can now add items to their Amazon cart via Twitter. Users need to link their Amazon and Twitter accounts and then simply reply with #AmazonCart to any tweet listing an item offered on Amazon. It will then be added to their basket and will only be processed when the shopper reviews their cart and approves the purchase.

UK start-up Rangespan has been bought by Google. The tech company, which uses data to help retailers decide which products they should sell and when, was set up by two former Amazon executives. The start-up is expected to be integrated within Google. Terms of the deal were not made public.

Waitrose is testing iBeacons at its recently launched concept store in Swindon as part of a series of trials to improve shopping experiences. Beacons at the entrance can recognise and welcome a customer and additional beacons around the store can push offers for the aisle the shopper is walking down. The supermarket is also trialing a number of other apps, including one that would allow customers to pre-order food and drink from its food and drink-to-go areas and a mobile payment app that could replace its self-scanning service QuickCheck.