A joint lecture in memory of Richard Catt, architect, surveyor and journalist, takes place on 2 April at 18.30, followed by a reception. Professor David Cadman of UCL will lecture on environment and sustainability, while Clive Wicks of the World Wildlife Fund will discuss rural development and conservation. Venue is the ISVA, 3 Cadogan Gate, London SW1. Admission by (free) ticket, from Gerald Bowey, tel: 0171 259 9995, fax: 9996. The organiser is International Building Press.