Almost 100% NOT a BAR. That I know of, it was NEVER standard issue to ANY British unit (other than the Home Guard, and very little of what they had was "standard"), although the Brits scheduled to invade Japan were supposedly going to be American equipped, down to the uniforms.
1930 is WAY too early for the Bren. There is another gun that LOOKS like the Bren, the Vickers-Berthier, which was issued to the Indian Army. I don't have my Hogg book on machine guns handy, so I'm not quite sure when that gun was first issued.
The British did issue the Hotchkiss "Portative" to cavalry in WWI. It was the British version of the U.S. Army's Benet-Mercier "Machine Rifle", used against Pancho Villa's troops in Columbus, New Mexico. It was bipod (and or small tripod) mounted. Rather than the magazine of the Bren and Vickers-Berthier, it used metal feed strips like the Hotchkiss and Japanese Type 92 machine guns.