"ATV/London Weekend at Borehamwood". London Weekend was nothing to do with ATV or Borehamwood. LWT was formed in 1968 and was initially based at the old Associated-Rediffusion studios at Wembley until the purpose built complex on the South Bank now known as The London Studios was built. The ATV studios at Borehamwood are now BBC Elstree and home to Eastenders.
The first two series of The Plane Makers involved Scott Furlong's attempts to sell the Sovereign airliner, mainly in competition with "the French". The Sovereign was one of those Tardis like TV/Movie creations that was much bigger on the inside! The storylines gradually transferred from the shop floor to the boardroom in order to focus on John Wilder (Patrick Wymark), a kind of prototype J.R.Ewing. Wilder did not have a "blonde glamour puss", but was married to Pamela (Barbara Murray, replaced in series three by Ann Firbank). Norma Ronald was Wilder's (brunette) secretary, Kay Lingard, staying with him into The Power Game years. Series Three focused on the develpment of the "Veetol", never given a name in the show, and designed by Scott Furlong subsidiary Ryan Airframes(!). The plots increasingly focused on Wilder's battles with bankers and Whitehall. Finally, Wilder gained a knighthood and moved on from the aircraft industry to the shenanigans of The Power Game.
Series two and three have been released on DVD. Only one episode from series one survives (included on the first DVD).