You're telling me.
On the plus side, it is the left's strongest-ever showing by far, and at least one constituency (these are multi-seaters) has gone entirely left. But it's not good enough to make a real change. Unfortunately when Labour began polling very strongly last year, instead of trying to build a broad left alliance with smaller parties and left independents it hitched its wagon to a right-wing party and spent most of its election campaign attacking the left. It ended up polling just strongly enough to (probably) put itself into government as a junior coalition partner, when six months ago it had a fair chance of being the senior partner.
On another plus side, this guy got in, which should at least provide some entertainment: http://en.wikipedia.org/wiki/Luke_%27Ming%27_Flanagan