Some can tell me date of the first air to air combat for Blenheim fighter?

Some can tell me date of the first air to air combat for Blenheim fighter?
i'm talking of original fighter version
i knnewn that first air to air combat of Blenheim fighters with radar happened in july 1940

Hello Vincenzo
it's late here and I picked up the thinnest of my Blenheim books, the Osprey one. According to it, the first FC Blenheim fighter combat was on 5 Feb 40, when a Blenheim fighter on a radar calibration sortie shot down an He 111 and the first CC Blenheim fighter combat was on 9 March 40 when two Blenheims from 254 Sqn were damaged by a return fire from an He 111 while on fishery protection mission.

Juha

Thanks