[amurdin]

I already have quite a few things in now and going well. Is there any veg i cant plant or sow this time of the year which does well?

[Chrysalis]

Spinach, lettuce?

maybe start a few broccoli off in pots and some spring cabbage for next season....
Still not too late for a late crop of carrots.... (that's cos I'm about to sow another lot after three disasters this year! )

You could buy in some courgettes for planting out and runner or french beans should grow fast at this time...

[mumofstig]

The Site's sowing and harvest chart is here
http://www.allotment-garden.org/grow-your-own/sowing-harvesting-vegetables-chart

[lazza]

lettuce and salad leaves all the way for me, with sowings every couple of weeks from April until September (although I usually have run out of space by July).