Col, I think it is the same incident, I think the book has the wrong date. There is a write up here (in Dutch and French) about Friendly Fire incidents, see page 10 and following) on NC-604:
http://www.dakota15wing.be/Dakota%20...39%20Digit.pdf
(You can Copy/Paste the related paragraphs into Google Translate to get a reasonable English version.)
The last paragraph translates as:
"Sergeant Marshall was 24, Sergeant Monoghan 21
years. The age of Davies is unknown to us.
The Wellington NC-604 crashed near
Waterschei not far
from Liège. The three crew members were also
buried in Evere just beside Flying Officer Tinker and
his crew as well as many others from 69 Squadron
and his "Service Echelon 6069" which gave their lives
during the period when the 69th operated in Melsbroek from
from September 44 shortly after the liberation of Belgium."