One could assume the owner of this corner shop near the Northern General Hospital is a Mr or Ms Your.
Perhaps Your is a shortened version of a much longer name. Like Yourgensen, for example. But I doubt it. More likely this huge, and surely costly, illuminated sign is down to a cock-up at the sign-maker.
Glaring examples of apostrophe catastrophes sit and smirk above shop doorways, on the sides of tradesmen’s vans, on pub chalkboards and café menus. Those whose businesses the ungrammatical text promotes put their trust in the supposed professionals they paid and are being made a laughing stock.
Send the grammar police to quiz printers and sign-writers, I say. If they don’t know its from it’s and your from you’re, hang ’em ’igh.