I used McCall's M6185 as a starting point. However, none of these really fit him - Errol is sweet and cuddly, not ferocious and angry.
So I took elements from the suits and made him a cuddle monster.
At Christmas, Verity was more excited about it and wore it more than Errol...
But Errol has come around to it and wears it all the time now. He is totally cuddly in it!