Labour has some internal splits: there are elements which are fairly left-wing and there are elements which are hard to distinguish from the Tories. There's almost always some degree of power struggle between the two happening inside the party, and the paradox the party is faced with is that the left wing part represents their members better but the right wing part is what wins elections. As such I would say that the UK leans pretty right wing and we've essentially never had a far-left government, and only occasionally flirted with some really left-wing policies.