BRIGHTON ELECTRICITY UNDERTAKING.

B506’s flag is explicitly conjectural, reconstructed from a monochrome Henry Moon photograph. It appears similar in tone to the funnel base, though Rosanoski assumes the band colour. The funnel confirms a wider “B” than the other letters, possibly explaining their invisibility on the flag. A pennant above it is probably white with the ship’s name.

The other source’s Henry Moon photograph shows a design consistent with B506, but the funnel colour is disputed and may have been a combined or teal shade.