Pea, Prawn and Lemon Linguine

DB prepared and ate it while I only managed to get hold of the leftovers the next day (and believe me, reheated pasta with a cream sauce suffers enormously), so I'll have rely a bit on his judgement.

He liked it a lot, but he thought that it was just a little too creamy and not really moist enough; it's probably a good idea to save some pasta water next time, just in case. He also regretted that he couldn't do anything with the prawn shells, but then again most frozen prawns come without shells anyway. It definitely wasn't enough for 4 servings, it was rather 3 very light servings, or just a main dish for 2 (either that or he must have had a huge portion yesterday...).

Crosspost. This recipe also appears on the BBC Good Food website.