Leeks & Onions

I wondered if someone could let me know if there are any problems with planting onions and leaks near to each other.  The thing is I've very nearly planted everything in my half a plot allotment but still have to plant beans (which I have a place for) leaks and sweetcorn.  I've planted the onions slightly too far apart so was going to put the leaks in between but need to know if this can cause a problem.  Can anyone reassure me.  Thanks

Oh thats good, and yes they should fit thanks