[Mike. Watterson]

Nearly true between 1953 and 1965.
1935 to 1945 was 5nnn series. Most had Lissen equivalents, though usually in a different cabinet.
Most of them after the post WWII Alphabet. 1945 to 1953
A, B, C, B2, D, C/A, C/E, G, H, J, K, N, T, N3
None of these had BEREC equivalents, though there were two versions of J. Later when BEREC was used a brand, the two later versions of J were branded as BEREC, not Ever Ready. It's the Saucepan. The early versions did use an aluminium case made by the London Saucepan Co. The two later BEREC versions used three pieces of steel, a front, a rectangle rolled into a cylinder and a back.

However the serial numbers continued it from 1953
L:Skyscraper, L26 (Inspired by Lissen Skyscraper name? They bought control of Lissen in 1928)
Q: Sky Queen. Basically same chassis as Model K and T. The Last T even have 25mA valves.
P: Sky Prince (it was supposed to replace last Model T same time as Q portable)
M: Sky Monarch AM. There was also the same year, 1955 a Sky Monarch AM/FM
There were two that started space; the Space Ace, a MW + SW model in a Sky Queen Cabinet, possibly the Ever Ready version of the BEREC Pioneer. Also the Spacemaster, a MW/SW model in Monarch style case, identical to the only BEREC with Sky in the name, the Skyscraper Mk. II! Did they mix up the Skyscraper II and Spacemaster in a marketing meeting? BEREC was purely Ever Ready overseas marketing, a carve up agreed with USA Eveready/NCC who used UCAR in overseas. UK Ever Ready briefly rebranded BEREC in UK (the original 1906 company was British Ever Ready Electrical Company, created by the USA Eveready).
They had three different Sky Queens.
The last was the 1965 Sky Baby.
Car Portable was an exception in Sky period.
The Skylark has no space in the name.
Briefly as they rebranded BEREC and just before Hanson bought them and asset stripped, they brought out the Skyleader, Skytime, Skymaster (no space), in 680n series, branded BEREC on rear and Ever Ready on the front.
Later USA Energiser (the rebranded USA Eveready/NCC) bought UK Ever Ready and completed the asset strip. Energiser/Eveready is purely a marketing brand owned by a pet food company.