If we ever get an enquiry for a Charger which we are unsure about. We simply go out and buy the product so we can be sure we sell the correct replacement to our customers.
See the video below -
If you need one, its for Sale here - https://www.acadaptorsrus.co.uk/34v-600ma-charger-switching-adapter-for-vax-blade-2-vbb2asv1-vacuum-cleaner/