My view is that the rightwing Labour government did far more to bring Thatcherism into office than the left wingers. And it was the antics of the same people, in and out of the Labour Party, with the breakaway of the SDP and all, that played a crucial part in keeping her in power. With the help of General Galtieri.
A lot of what was scorned as "lunatic left", on the part of Ken Livingstone for example, is now casually seen as boring old orthodox consensus.