Were to draw the line and what ever happened to left wing

In the recent General Studies paper it asked something along the lines of:
'Labour, Conservatives and Lib Dems, they are all the same, theres no point in voting' 
Discuss wether it is worth while having different political parties. 
The entire premise of my EPQ is about the different philosophies and policies of different parties so this question spurred me into some what of a frenzy of defining political parties, historical examples. Hopefully which will give me quite a good grade at the end, although you can never tell with General Studies and most peoples view on the subject (not mine) are summed (if not a bit roughly) by youtuber: RichandPoor. 


Yet upon coming home I noticed this article: 

Lord Owen 'could vote for Labour' under Miliband

Lord Owen was one of  the key founders of the SDP party that broke away from labour in the 1981s to eventually merge with the Liberal party to found the Liberal Democrats. The fact that he would not support the Labour party makes a complex situation more difficult. 

There was a time when Labour and the Conservatives were clear cut (not that i was alive to remember it)  and it was not too hard to define the Lib Dems but now drawing the political line is very hard! 

Historically Labour were left wing, Conservatives were right wing and the Lib Dems were central left yet right now the Lib Dems are in coalition government with the right wing Conservatives. 

Oh but how right wing are the Conservatives, replacing a flaming touch with a green tree signalled a so called reinvention of the Tory party to the centre. David Cameron trumped the 2010 emergency budget as 'fair' and progressive, but their  polices don't seem to much of a far cry from Margate Thatcher. Experimental economic policy (crowing out theory and PSNCR priority) and downsizing the public sector is classic Tory policy.  Even the Conservative command acknolages this,  this we know thanks to Wikileaks. 

Yet tweaks to the Conservatives to make them friendlier and more electable seem like nothing compared to Tony Blairs New Labour. The reinvention of Labour Party sifted the party of the Unions into a central  Party to Govern Briton for just under 13 years. Tony Blair was named 12th most infuential right winger in the telegraph! Nick Clegg leader of the 'central-left' Liberal Democrats came 3rd!!

What happened to left wing!?

Well Mr Milliband is not leader of the labour party and it seems he is brining back the left. Elected by the Unions Ed is not new labour which means he could just be left of centre? 

If your looking for the true left wing its actually within the right wing government, if you ask me I would say it those Liberal Democrats that risked peerage to vote against the tuition fees. In time we could see the end of the coalition, if the Lib Dems don't break under pressure they will dissolve back into two parties!