I have previously written about the SEISS (self-employed income support scheme) which provided funding for individuals who were self-employed in 18-19 and correctly submitted a tax return.
However, the scheme will have excluded a lot of GP locums if they were not self-employed during or before the 2018-19 tax year.
Hopefully those entitled to claim for the first tranche will have considered if anything is available for the second. But that is unlikely to be the case if there was work available from 14 July.