A visit by the parents for Sunday lunch is a potentially daunting experience. Especially if you have grown up with consistently delicious Sunday lunches produced in a seemingly effortless manner. So when the folks arrived for a weekend with their London-based sprogs, and treated us to a West End show, I knew I had to impress. Error number one was assuming they would be late, and that I'd have time to nip to the butchers, before they arrived...