Here you go !.
£6.43 with free P&P - Good Deal !.
The dealer price is likely to be a lot more expensive.
"Top Tip" :- Try using wooden cocktail sticks, to apply the base coat bit by bit into the chip.
You will have more control than with the supplied brush.
You CAN mix the base coat with the lacquer and apply it together, but the drying time will be longer.
( If the chip is really deep, use the base coat FIRST to help build it up, as this will dry faster ).
Fill the chip until it is JUST proud of the original paint finish, then allow to completely dry hard, then you can cut back the touch in, with a fine cutting compound.
You want the touch in to be JUST proud, no more !.
So, when you cut it back, it will be at the same level as the original finish on the car.
Ask me how I know ( my original ZS EV Gen1 was finished in Dynamic Red ).
It should be almost invisible if you get it right !.
There will be a very slight difference in the colour, because you can not replicate a spray gun finish, with a touch up stick.
Also, the Dynamic Red is a tri-coat finish as well, which makes it a little more difficult to match.
A solid single stage paint like white, is a LOT more forgiving.
Hope this is of some help

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Red RSH 10166911. Genuine MG Touch up paint set. lacquer in one pen.
www.ebay.co.uk
Here is amore professional kit that is excellent, but more expensive.