"It's hard to see how any form of insurance would 'cover' the deaths of seven people"

The club, as a club, almost certainly has Public Liability insurance, which would normally be to £10m+.

I can understand the police investigating the bonfire/fireworks aspect, but was it really necessary to cordon off the whole are and do a fingertip search?

Preserve a suspected crime scene by all means, but what are they hoping to find, evidence of deliberate and malicious smoke making?

"Preserve a suspected crime scene by all means, but what are they hoping to find, evidence of deliberate and malicious smoke making?".

Correct me if I am wrong, but it is a crime scene, lives have been lost,injuries (some serious) have occurred, damage as been done, and there as to be a contributing factor or factors as why this serious incident took place!.

When all the available evidence is gathered, then it will be a case of the specialist investigator's to perhaps find the 'near as possible' reasons why, and who may have been to blame. And this sure isn't going to take a few days.

Regarding driving and motorways, this website might possibly have some interesting information http://www.safermotorways.co.uk/statistics

"looking for debris that might indicate that the bonfire included material that would burn with a heavy smoke; old tyres, plastic, etc.!

It would be an unusual bonfire which did not include this sort of material.

"I assume that you are referring to the M5. "

No, I'm referring to the site of the bonfire inside Taunton Rugby Club's ground.

"When all the available evidence is gathered"

But what sort of evidence are they looking for?

I made no such statement.

I simply asked why they were doing what they were doing, because as someone who knows nothing about it I would like to know.

"I simply asked why they were doing what they were doing, because as someone who knows nothing about it I would like to know".

Well that's very easy to explain, they were obtaining forensic evidence, which could be assumed that most people would be fully aware about nowadays!.

Changing subject slightly, I notice that there as been another 'motorway' incident, when a large lorry crashed through a barrier and landed on the dual carriageway below. Luckily there was no other vehicles involved, but the driver of the lorry was unfortunately killed.