@HectortheInspectorHow can you be a "Parliamentary radical" if the most significant point of your political career was repeated failure at getting elected to Parliament?
Well - he was rather radical in the European Parliament.
@MoleBath suggested a place in the HoL for Farage.
Should this happen I would consider him to be a continuation of a long line of Parliamentary radicals...
On account of their being other radicals in previous Parliaments and if he were to get in, I wouldn't be surprised should he be a continuation of such.