I've never warmed to Delia Smith...maybe she does not come across as some one who loves her food.
My choice for a cook book would be Nigel Slater's "Real Fast Food"...nothing too complicated-all could be done in 30 minutes. Some are simple-like his variations on grilled chicken and the sandwiches you can make. Others are a bit more complicated,like my fav-Mozzarella Chicken with Pesto Gravy...but still very quick to do.
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I would also recommend you get a freezer if at all possible-even second hand. It will-at the very least-allow you to take advantage of good prices on meat and poultry.