will you try to start the right eng considering the urgency?
I can't find the report to BA Flight 9 June 1982, but seem to remember the first engine which failed (No 4) was shut down using the "Fire Engine Checklist" which involved pulling the Fire Handle. After all 4 engines had failed, No 4 was the first one to successfully be re-lit.
Volcanic Ash Forces British Airways Flight 9 To Land