It's just how it's pronounced by illiterates from the south in general. When singing it it will sound more like 'r's' than 'ours or hours even.
fixed
the bastardisation of the English language by our woeful education system in the last decade is a disgrace, I work with a few people in their twenties who can barely string a correct sentence together
I blame John Thaw and his transition from Regan to Morse.
9 tengths of the idiots.