M&S Dine in for Two for €12.50 is back on again today, running until Tuesday.  Full menu is available on the M&S website.  I think the Grill Chicken Breasts main is great value, you can definitely feed more than two with them.

Related posts:

1. M&S Dine in for Two for €12.50, June 30-July 5
2. M&S Dine in for Two for €12.50 runs until Tuesday
3. M&S Dine in For Two, May 27- Jun 1