PEUGEOT, Citroen, and Vauxhall have revealed that their medium van challengers are to go electric. All coming from the PSA Group, the e-Expert, Vivaro-e, and Dispatch Electric respectively will share a platform and powertrain. Two battery sizes will be on offer, with a 50 kWh pack offering 124 miles on a charge, and a 75 kWh battery good for 186 electric miles.…