I'm sure it is possible to receive a rigorous and challenging secondary education in the UK but, according to Lubos Motl's summary at The Reference Frame, it's getting harder to find.
Motl is specificially speaking about the softening of the sciences. A quote:
...all subjects have been affected. In literature, great poets are omitted while third class poets are included according to a political key. Civitas also confirm Grey's statement that the new subject "scientific literacy" is not really about chemistry, physics, and biology but rather about media studies. The children are expected to discuss AGW, GM crops, and whether scientists should be trusted. I have no idea how they can decide whether scientists should be trusted if the children learn no science.
If this is taken too far, where will their engineers and naval architects and doctors and physicists and science teachers and inventors come from? Eastern Europe, India and China?