Wikipedia referenced Janes All the World's Aircraft 1976-77, which volume I have. No three views of the Lockspeiser LDA-01 but a photo of the 70% scale prototype in flight banking away from the camera shows the canard and rear wing/tail shapes well with pusher engine The Janes reference also has full dimensions, areas, weights, performance figures-far more data than Wikipedia with substantial descriptive text covering the prototype. Janes calls the canard the foreplane.
If David Lockspeiser, Managing Director or Christopher Bean, Secretary are still alive in England-you might try hunting them up. Lockspeiser Aircraft Ltd. was located at 652 Grand Buildings, Trafalger Square, London WC2 5HN.
Alternatively, the British CAA registered the prototype as G-AVOR. Might they still have any records? Does the UK have a central repository of old aircraft blueprints like our Smithsonian Institute? Apparently, there was no full scale LDA production beyond the 70% scale prototype.