heston's pea & pancetta spaghetti

Ana's out tonight, whooping it up with the Hurlingham girls at Kate's. This leaves me home alone, with only a bottle of my dad's apricot brandy and my new comedy fixation, Bleak Expectations, for comfort. Harrumble indeed!

However, spoof Dickensian comedy and high proof home brew only feel the soul, the stomach requires something more substantial. However, can anybody tell me what's missing from this by-now-classic Heston dish?

Pancetta is the obvious answer, but I presume you all noticed the lack of egg yolks? I only had one which whilst hardly disastrous, certainly made it less unctuous.

sources
heston's pea & pancetta spaghetti - Waitrose Weekend, 16th September, p10