Nintendo has confirmed that they will release the Nintendo Switch Dock Set in the UK on June 23.
The Switch Dock Set will include a Nintendo Switch dock, HDMI cable and AC adapter. You can see the official tweet from Nintendo UK below.
— Nintendo UK (@NintendoUK) May 10, 2017
There has been no price confirmed for the set in the UK at this time. In the US however, the dock set has been priced at $89.99.