Will it start with a sniff of engine start, sprayed into the the EGR? if so then as above do the leak back test.
1
This test soon showed which injector it was causing the same problem you have.
2
https://www.ebay.co.uk/itm/313917651...4AAOSwqsJiMzjb
PS
I am presuming you have since tried to start the car from cold so the cam sensor is also cold, and you have the same result, and you have enough fuel in the tank above the 1/4 mark if UBP is in situ.