By Pallab Ghosh Science correspondent, Edited by Amal Udawatta, IMAGE SOURCE, BBC NEWS Image caption, Produce like these gene-edited tomatoes with added vitamin D could be sold commercially in England The law has changed to allow gene-edited food to be developed and sold in England. The government hopes the technology will boost jobs and improve food production , but safety and environmental worries mean it is not allowed in other parts of the UK. What is gene-edited food? For many years, farmers produced new varieties through traditional cross-breeding techniques. They might, for instance, combine a big but not very tasty cabbage with a small but delicious one to create the perfect vegetable. But this process can take years, because getting the hundreds of thousands of genes in cabbages to mix in just the right way to produce large but tasty offspring is a matter of trial and error. Genetic methods remove the random element. They let scientists identify which genes determine size a