I didn’t include Argyll House in my description of Westcliff-on-Sea because I couldn’t find out anything about it: that’s because I only had my copy of the original 1954 Pevsner, which would have spurned an example of seaside moderne, not James Bettley’s huge and revised 2007 edition which tells me that it was designed by Howis and Belcham (they specialised in cinema design) in 1937:-

1937? That’s not ‘neo’-Moderne – it’s the original stuff! I noticed today in the
Renzo Piano exhibition his re-inventionn of the 1939 Moderne-style Los Angeles May Co. department store as the new Motion Picture Academy building.
Yes, of course, you’re right. I’ve changed it accordingly. Charles