Hello all,
It is now apparent that this is the same incident as reported on the excellent website:
http://ktsorens.tihlde.org/flyvrak/garstad.html
The location was apparently NE of "Namsos," Norway, and happened on 18 April 1940.
We carry this in the EoE LW Loss DB as:
18 April 1940: 3./KG30 Junkers Ju88A-1. Run low on fuel during unsuccessful sortie to attack aircraft carrier Furious off Narvik and forced-landed on Breivika Farm, Mellom-Vikna, 30 miles north-east of Namsos. FF Lt Hermann Peter, BO Oberfw Eugen Drexler, BF Fw Rudolf Napparell, and BS Uffz Günter Burmeister all captured unhurt. Aircraft 4D+BL fired by crew 100% write-off.
This crew was taken aboard HMS Cairo and landed at Scapa Flow on April 22."
While an important incident for our EoE Project series on the Scandinavian Campaign, it is clear that this was not in France, and doesn't apply to the Phoney War incidents in France that I was looking for. The conclusion remains that there were only two Ju88s that came down on French Soil during the Phoney War.