A long time ago, in a sweetshop far away... Swizzels Matlow rolled out a series of candy containers shaped like spaceships. Each one was filled with sherbet and was made of coloured injection moulded plastic.
Unscrewing the lid and eating the candy inside, left the plastic shell ready for a quick wash and then the containers could be joined together to make various shaped spaceships, or by using the three different spaceport sections, a large and expandable space station. The ships were sold in a counter box and at 10p each it was easy to cherry pick the ones you wanted to complete your collection.
Way back in the mid eighties, I made regular pilgrimages to newsagents and sweetshops to find as many of the little spaceport sections as I could.
The candy was horrendous and made my teeth ache just by looking at it and as I had previously made myself ill by consuming boxes of KP Outer Spacer crisps in order to get the Alien Space Fleet, I usually just emptied out the sugary contents and went straight on to building the station.
There was also a Spacefleet 2000 poster showing all the ships in the line - but i cant recall where this came from, possibly it was a mailaway.
Sometime later, I happened across a similar candy premium called Astro Fizz in the shape of a space glider type ship. This one was hastily filed in the vaults and still has the sherbet inside! Yuk..
POSTSCRIPT BY WOODSY 2015:
USA Version by Ca De Candy 1982 CD 2000 Space Fleet - small pics from an old Ebay listing [see my comment below - Woodsy - in the comments for the listing description]