[joeysteele]

I agree that for the Scottish and Welsh assembly elections, that should be between the Parties seeking election in Scotland and Wales only,also the Northern Irish assembly too.
However, there could never ever possibly be a Welsh Nationalist,Scottish Nationalist or any of the Irish Parties govt. of the whole United Kingdom at Westminster.

The 2015 election will be for the whole UK Parliament and only Parties that are standing across the UK should be in the debates.
The criteria for same being if they have MPs,MEPs and also Councillors already elected.
That for me opens the door to the Greens and UKIP with the Lib Dems, Conservatives and Labour and no other Party at present as to the Westminster election of 2015.