outdoor cucumber question

I am planning on growing 2 types of cukes this year, marketmore and a gherkin variety. Do i need to worry about cross polination as with sweetcorn? shoul i plant them at opposite ends of the plot? any advice gratfully received as this is only my second yr of cucumbers and first growinf more than one variety!

thanks in advance.
Kate

They can cross pollinate, but as you're eating them, (hopefully) before the seeds are anywhere near mature, it shouldn't affect the taste. It'll only be a potential problem if you try to seed save.