Masonry oven modular ovens, all these methods are still in use. In all cases, the ovens typically go under a roof or some kind of weather protection. Perhaps the most significant change in masonry oven construction practices is insulation. Since masonry loses heat as fast (or faster) than it absorbs it, early ovens extended bake times by increasing mass. Thicker walls held more heat to bake more bread — but only up to a point. Since heat moves from high to lower temp, the outside of the oven can’t get as hot as the inside — unless you wrap it in a
All Gas and Gaiters BBC in this era. Two of the colour episodes from series 5 are preserved as black and white 16mm film recordings only (three earlier episodes were always black and white). Only six colour episodes are preserved in their original colour videotape format. "Christmas Night with the Stars" was a programme screened annually on Christmas night, when the top stars of the BBC appeared in short versions of their programmes, typically five to ten minutes long. "All Gas and Gaiters" appeared once alongside its sitcom spin-off "Oh, Brother!" in 1968. This telerecording no longer exists in the BBC's film and videotape