Gray cockatiel with yellow crest

I'm devastated after I misplaced my gray cockatiel yesterday around 3pm near Market Street by the Arndale Centre in Manchester city centre. The bird is about the size of a small dove, grey with a bright yellow crest and orange cheeks, and there's a distinctive small blue leg band on its left leg with the imprint 'M'. He tends to perch on my shoulder and chirps when he hears my voice, which makes him easy to spot if you see him. He's my daughter's pet and has sentimental value - this little guy is part of our daily routine, and I really need him back. If you spot him, please drop me a message; I'd be forever grateful.