The queen, apparently, has a Slough postcode. Robb Johnson also wrote;

God save our gracious queen, long live our noble queen
She lives in Slough
It's by the motorway, just a stone's throw away
From where the refugees all stay
She lives in Slough

She's just like you and me, with a posher lavatory
She lives in Slough
Tourists and tyrants know, it's handy for Heathrow
She wears a hat and says "Hello" ("What do you do?")
She lives in Slough

And though she owns Balmoral, and her income's immoral,
She lives in Slough
And though there's a credit squeeze, and all our wages freeze
Who get's another Jubilee? (Paid for you and me)
She lives in Slough

Alternatively;

And though she owns Balmoral, and her income's immoral,
She lives in Slough
She probably likes the view, and a good sag aloo
She probably votes Labour, too
She lives in Slough!