That's the message from Boston police following a spate of opportunist burglaries through open windows.

Crime reduction officer Pc Nic Hanson said: "Open windows and doors may let in the fresh air during hot spells but it takes just seconds for a burglar to walk or reach in to grab purses and other valuables from windowsills and worktops.
"However, following some simple guidelines can really reduce your risk of becoming a victim of burglary or theft."

Pc Hanson advises:
l If you are at the rear of the house or in the garden, always ensure the windows and doors at the front are locked.
l Lock all downstairs windows at night.
l Make sure your house is secure when you leave it, even if just for a few minutes.
l Do not leave valuables in sight or reach of any open windows.
l Mark up valuables with your postcode. UV markers can be used but, if the item is suitable, paint pens, or other overt permanent markers make the item less attractive to thieves as they are harder to re-sell.

l Information: Contact Pc Nic Hanson, tel 0300 111 0300.