Hello Leo,
Please note that the Blenheim that hit Lt. Viedebanttīs Bf 110 certainly did not belong to No. 141 Squadron RAF. The squadron was a night-fighter unit then, equipped with Boulton Paul Defiant aircraft. Moreover, it carried out no operations on 18 April 1941 (source:
www.oldrafrecords.com).
Hope this helps a little,
Ota