Brilliant stuff @cossi. Never seen that Rocket Eaters by Firework Factor's before. Hope you still have those Apache rockets I asked you for a couple years back, I'm finally getting a motor in the next week or two so will finally make a trip down if you do!
Those Sohni (ESCO) imported German Weco Whistling Bangers were sometimes a bit of a folly because they wouldn't always whistle loudly before they bang. That German imported Weco Diamond Sun Pinwheel imported by Standard Fireworks Limited, Huddersfield, West Yorkshire HD4 7AD was often found in the range topping Standard Fireworks Connoisseur Party Selection Box Of Fireworks, and would be also sold individually as part of their trade mixed firework cases for the shop display counters.
Remember Feistel from mid 80's then in late 80's they took Benwell under their wing to form Feistel Benwell Limited with a mix of German and Chinese Feistel Fireworks and British made Benwell Fireworks in their selection boxes.