So would consider your political beliefs to be centre centre/left mainstream then?
If you take a scale of 1 to 10, with 10 being Hitler and 1 being Trotsky, you would probably find the current Tory party at around 6.5, with Labour under Blair being about the same. Miliband's Labour would have been a little more to the left, let's say a 5.5, but still to the right of centre.
UK politics, and certainly the press, is almost all right of centre.
Corbyn is no more than about a 4 on the scale.