Thanks i have tried to plant some today and I hope that they work well. But may still buy some shop grown ones and see what does better
Leeks:- alot depends on the size of leek you are after. Leeks like a long growing seasons so sowing early helps to facilitate this. I have always sown my kitchen leeks as early as possible in a propagator, but Samantha's plastic mini green house will help provide the right conditions for germination. Leeks transplant easily so if you were to sown into a seed tray now it will give you plants to transplant by end of May begining of June
I can recommend the plastic greenhouse idea - I bought one at my local pound shop (for £10) and it's proved very useful because I have only limited sunny window space in my house/garage. I'm just starting to see some action now from the leek and carrot seeds I planted a few weeks back
Not wishing to be churlish but £25 is a heavy investment to grow leeks. Why not use a pot and cover with a plastic bag (or cling wrap). Start off on a windowsill and move outdoors when the seeds have emerged and it is warmer. Remove the wrap after a week outside. Once you have three inches or so of green "grass" tip the whole lot out and plant out in final growing positions.
I sow them in modules with plastic covers, like the Aldi ones. They do take a longer time to germinate, so don't give up. They may run out of nutrients,so you can give them a little liquid feed even in the seed trays after 8 weeks.