After all these years, I've been using tin foil wrong. According to Tom Kerridge it should be shiny side down!!!! Oh dear I've always put the shiny side up. What do you think?
When I unroll it, it's in my hand, neither side up nor down. I doubt it matters but if there was an iota of difference I'd suspect a shiny surface reflected better than a dull one so shiny side inwards maybe ?
Just thought I'd add, the some shop bought pies such as pukka use foil trays which are black on the outside, for better heat transference.
Probably some other manufacturers too, if I remember right.