Calling people/things by their proper name

As a kid, I was presented a meal of Steak & Kidney Pie and told what I had on my plate was Snake & Pigmy Pie.  This is my earliest memory of things not being called by their real name.
Throughout my childhood, and into adulthood (apparently) the habit of renaming stuff has remained.

Demis Roussos = Demisis Roosis
Ed Milliband = Steve Milliband
Heston Blumenthal = Heston Services or Heston BloominEck
Hugh Fearnley-Whitingstall = Hugh Fearnley-Whittingham-Twittingham
Barry Manilow = Barely Manenough or Mandy Barilow or Merry Bandylegs

Britains Got Talent = Britains Got NO Talent
I'm A Celebrity, Get Me Out Of Here = I'm A Non-Entity, Get Me A Career


Waterloo Road = Grange Hill for Grown Ups

Aberdaron = Abu Dhabi
Lav = Meeting with Mr Brown
Alcoholic Drink = Beveration
Peanut Butter = Peanotre Botre

Its not spoonerisms.  Nor is it gibberish, its just a case of "my own words in my own world".

Right - I'm off for a pint of earwig & a tosty chesanam sanger with chippings