The back cover of my 1933 guide to Caernarvon Castle has a full page advert for ‘Selo Roll Film’. (Compare this with a 1937 advert for the same product.) Clearly visitors to Caernarfon would be using portable cameras to capture their adverts.
This was a guide published by His Majesty’s Stationery Office and so the advert seemed surprising.
But then I spotted that my 1989 reprinted 1987 English Heritage guide to Longthorpe Tower carried a mention of Gateway Foodmarkets Ltd. My other ‘white’ English Heritage guides do not mention Gateway. So where else did this sponsorship appear?