Given how long Nuclear plants can take to set up, the ones that ought to have been coming online around about now should have been commissioned in possibly the mid-90's. Which makes it also Major's fault. But it's both side's fault, really.
The basic problem is that Nuclear power is expensive and in recent years no-one wants to fund it. The Green lobby can sometimes bring benefits (let's face it, cleaner energy is not a bad thing really!) but in the case of Nuclear power it's got it totally wrong, and made the issue politically dangerous to go near. It's hardly Labour's fault. Labour doesn't run things in Germany for example, where all Nuclear plants are being shut down because of meaningless and irrational fears in the wake of Fukushima disaster.
You can, if you like, blame it on the far left. But then it's the Right's fault too, for listening!