No probs Glamrock - you are doing a grand job. here are some things for you to consider or add as you wish:
Mint Cracknell and Lime Cacknell - Chocolate covered bars with a shard-like filling. Mint came out first. Lime did not last very long but both were quite popular and are much missed by us 70s veterans.
Milk Tray Bars - a moulded chocolate bar made up of chocolates from the Milk Tray Selection. Fillings included starwberry cream, fudge, lime barrel, turkish delight and hazelnut in caramel. Cadbury's also did a plain chocolate version called Plain Choice.
Frys Five Centres - a bar the same size, shape and style as Frys Chocolate Cream (still available) but with different fruit flavoured fillings. Also made in milk and plain versions.
Aero bars came in many different flavours in the 70s. There were milk and plain chocolate versions, a version with milk chocolate outside and plain chocolate inside, a coffee-flavoured version, peppermint and orange versions and also a lime flavoured one and a strawberry flavoured one.
Tic Tacs came in many flavours in those days too including cinnamon, spearmint, orange, tangerine, lime and aniseed.
Chocolate Treets, made by Mars, were very popular. there were toffee, peanut and chocolate versions. The chocolate version was flat with a hardh shell and chocolate centre. They were re-named Minstrels and still exist. The toffee flavour and peanut flavour were round, had a hard shell coating and a chocolate and toffee or chocolate and peanut centre. They were discontinued, although some people say the peanut ones were coloured and re-packaged as M&Ms. I think they taste completely different.
Galaxy Counters were the same as the flat chocolate counters you can still get in bags of Revels. Everyone loved them so why they got rid of them I don't know.
Opal Fruits were the original Starburst sweets before being re-named and having their flavours messed around with. Also, there was a sister sweet called Opal Mints. They were delicious, chewy, creamy, spearmint chews. Eventually they re-named them Pacers, stuck a green stripe through them - then got rid of them altogether!
There were dozens of other great sweets, chocolates and lollies that I can't remember right now but I will add them as I remember them. I am sure other members of the Forum will join in too.