HL Deb 10 May 1999 vol 600 c124WA
Lord Tebbit

asked Her Majesty's Government:

Whether they will set out the policy aims which in their view qualify an organisation to be described as "extreme Right-wing", which expression was frequently used by the Home Secretary in BBC broadcasts on 26 April. [HL2227]

Lord Williams of Mostyn:

The extremists, self-styled as "Right-wing", to which many people referred on that day support racism and intolerance. They promote bigotry, hate and violence.

It is not a technical term but one that is in general use. I am sure that listeners will have understood the description as applying broadly to fringe groups promoting racial and other intolerance, extreme nationalism and bigotry.