The availability in the United Kingdom of scrap tyres which could be used as fuel in a power station has been investigated. Information related to current arisings of waste tyres is already available but it is known that for more than 50 years tyres have been scrapped and disposed of in progressively increasing numbers. Enquiries made with the Planning Officers and Waste Disposal Officers of local authorities have yielded data on most authorized disposal sites but much of the tipping which took place in the 50s and 60s is acknowledged to have been on unauthorized sites. In the case of 17 of the reported sites, tyres had been mixed with other waste in the general body of the tipping site so as to make recovery virtually impossible. In the remaining 28 sites, approximately 22 x 10{sup 6} tyres were said to be lying in 21 sites while at 7 sites it was not possible to indicate the like quantity although one was described as having very large quantities. It is currently not known with any degree of certainty how many of the tyres in the 28 sites identified could be `mined` for in energy-from-waste schemes. In two appendices the results of enquiries to local authorities are recorded and identified sites with numbers of tyres, where known, listed. (UK)