Lost gray tabby with blue collar, Milo

Hi there, I'm really worried about my cat Milo. He's a medium-sized gray tabby with a white chest and two white paws, and he wears a blue nylon collar with a tiny silver bell. I last saw him yesterday around 6pm near the Covered Market on Broad Street in Oxford; he dashed off when a cyclist zoomed by and I couldn't catch him. He has a small notch on his right ear and a faint white spot on his nose, which I hope helps someone recognize him. Milo is usually affectionate but skittish with strangers, so I'd be beyond grateful to get him back home; he's my family's little shadow and this has been really stressful.