The official hard case for the Nintendo Switch made by Hori.
this is the lowest price I have seen, Just paid for and picked it up today! seems like a nice solid case.*UPDATE* Amazon have matched Price and are back in stock if you prefer to buy there £29.99 on Amazon
Also they Have a decent price for the screen protector/case accessory pack £16.99 on Argos
£19.48 on Amazon last time I checked