§ Mr. Fox
Inquiries into the matter of the deaths of birds in the Mersey estuary are being carried out by the North-West Water Authority in co-operation with local industry, statutory bodies and voluntary wildlife organisations.
I understand that relatively high levels of lead have been found in the organs of dead birds, although this has not yet been confirmed as the cause of death. The source of the lead has not been determined, and tests are still being made on samples of surface sediments and organisms from the mud flats of the estuary where the birds are known to feed. Results to date show no change in metal content from the normal level determined by annual survey since 1974.478W
In these circumstances, I see no cause at present to intervene in the work of local organisations, but I am watching developments closely.