How to prevent insect bites this summer

While our lovely long summer has bought with it endless days in the paddling pool, picnics in the park and Pimm's in the pub garden, all this outdoor activity has also meant running the gauntlet of pesky insects - all waiting to take a piece out of us!

So should we really be rubbing garlic cloves on our skin, drinking tonic water or munching on marmite to repel them? Is there any trap we can set to wasp-proof our picnic?

Insect expert Professor James Logan is the man with all we need to know, including the four ingredients we should look out for:

• Deet

• PMD (lemon eucalyptus) Picaridin

• IR3535