§ Mr. William Wilson
asked the Secretary of State for Foreign Affairs why during May, 1965, the Burgermeister of Dresden, Herr Schill, who wished to accept an invitation from the Lord Mayor of Coventry to visit Coventry, was refused a travel permit by the West Berlin Allied Control Office.284W
offer encouraging prospects in the seismological field. Our studies are by no means complete, however, and it should be emphasised that no detection system which we have in prospect will be able to identify all underground events with certainty, nor will it distinguish between nuclear and chemical explosions of the same magnitude. A certain number of on-site inspections therefore remains necessary for positive identification of nuclear tests underground.