Streetlife

can any one please help, my friend has lost her beige coloured greyhound called bailey.. he has been missing since thursday 7th feb ...from walthamstow (hoe street area)  when he got out the back gate at about 6am...
he is a very timid soul and quite nervous .. he didnt have his collar on and is still missing .. we are all very very worried as its been so cold in the night
anyone please please contact me if they have seen a sighting for a beige greyhound on the loose in any area near walthamstow or know of his where abouts
thank you
lorraine