At the North Hendon Adath Yisroel Shul, which is north of Golders Green, as it was cloudy, we commenced the Siyum for the Bechorim in the playground of the Hasmonean Boys High School. As we reached the Hadran, the clouds started to disperse and we said the nusach of Birchas Hachamoh as devised by our Rav, Rabbi Dovid Cohn. After Oleinu, we completed the Hadran and the long Siyum Kaddish was recited. This was indeed a unique experience. Even more so as the wather forcaston Tuesday was not promising and it was pouring with rain most of the night. It was a real Chessed that we were able to recite Birchas Hachamoh Bizmano. Even those who arose late were able to say the Brocho as it was sunny all morning.