The introduction of colour television in the United Kingdom from 1967 meant that broadcasters felt there was even less value in retaining monochrome recordings. Such tapes could not be re-used for colour production, so they were disposed of to create space for the new colour tapes in the archives, which were quickly filling up. The increased cost of colour Quadruplex videotape—approximately £1,000 per tape at today's prices—meant that companies still often re-used the tapes for cost control. Negative attitudes to a programme's value also persisted. For these reasons, many programmes survive only as monochrome film recordings, if at all.