Morton, the PESJ - pilots emergency safe jettison - could literally drop the lot on the Vulcan. I imagine the Victor had a similar system.
The release system was the 90-way. This was used to set the time interval between bombs.
From memory we used a setting of 0.30 seconds. For a stick of 35 bombs as 0.3 seconds the time between 1 and 35 was 10.2 seconds. The vertical distance between first and last would be about 1,800 feet.
Again from memory the available shorter intervals were 0.18 and 0.09. Assuming the shortest would give an interval of 3.06 seconds and a vertical separation of 150 feet. This looks pretty close to the setting. I am not sure if there was a shorter time available.
Apart from the rapid weight reduction there was also CofG change but minimised through bomb sequencing stn 3-5-1 in sequence followed by 4-2.