Reported by Thomas Bennett in fb group:

Dell Venue 8 7840 8.4-inch Tablet Charging Adaptor - (2400 mAh - 2.4amp) Extra Power CE / RoHS Approved Mains USB UK Plug Power Adapter Charger for Accelerated Charging - White by Gadget Giant® https://www.amazon.co.uk/dp/B017QEAL6K/ref=cm_sw_r_cp_apa_CEL1AbX37ASVN