I have just done this, it is quite straightforward with the 22mm to ¾ wall plate. Available on eBay are kits for this with or without double check valves.
What is important to note is that the ¾ ‘farm yard’ taps have a ⅞ threaded connector on the outlet. In order to use a 19mm hose, you can either use the supplied barbed fitting, use Geka brass fittings to convert to 1” or ¾ BSP, or just stick with the Geka fittings for all your hose fittings as they are about £3 each and have a large bore. They also sell a ¾ barbed Geka fitting for the 19mm hose.
I have the ¾ hose from Toolstation and it works great.
Also, timed 15 seconds to fill a builders bucket direct from the tap.
TonyJr