Williams Pear - Manky Leaves?

I've just checked my Conference pear. Its the only one of my fruit trees that has flowered. Although in general it looks a lot healthier that yours the very tip leave was curled so I nipped one off. It was full of what looked to be green fly aphids although they could be summat that only attacks pears?
Sorry can't be more helpful!

Thanks fella

Will remove all the leaves now