Insect in the eye-injury - My Eyes!

So I managed to get some kind of London road crap in my eye on the way to work this morning, I can't see it but it is causing me all manner of pain, and I have failed to wash it out.

Any advice? Surely others have had similar misfortune.

(I've had something visible stuck lodge into my eyeball before whilst cycling and ended up in A&E with a nurse picking it out with a needle - something I would rather avoid)

A+E.

Now.