St John Ambulance

St John Ambulance's logo appeared faintly and clearly on/off on the First Doctor's TARDIS. (TV: An Unearthly Child-The Tenth Planet/Twice Upon a Time) It was not present on the Second Doctor's TARDIS, (TV: The Power of the Daleks-The War Games) however it returned on the Third Doctor's TARDIS to be added

The sticker was completely removed from the Thirteenth Doctor's TARDIS. (TV: The Ghost Monument)