By Jessica Frank-Keyes The next government must back London as an “engine of growth” for the UK, including a greenbelt review and supporting airport and rail hub expansion, a lobby group is urging. Lobbying group BusinessLDN is calling for the next government to prioritise economic growth and leverage private investment, in its manifesto ahead of the July general election. The body has set out a package of recommendations for quick wins and regulatory reforms, including: scrapping stamp duty on share transactions; reforming the Apprenticeship Levy; and putting London on an equal devolution foo…