Under the health & safety laws, employees have to accept a certain amount of responsibility for their own safety. (It can be a criminal offence to endanger your own safety).
It's extremely unlikely that a claim for negligence against the company would succeed, unless (for example) your husband had phoned in to the company to say that he'd had to stop because of he high winds and the company insisted that he must continue. (Even then, he would be held partly to blame for the accident. The golden rule is 'If it isn't safe, don't do it'). In theory, the firm could sue your husband for the cost of the damage to the lorry. (i.e. the legal argument could be that your husband risked damage to the company's property when he should have known that it was unsafe to continue driving).
Even if your husband could bring a successful claim for compensation against the company (which, as I've indicated, is extremely unlikely), it would probably be 2 or 3 years (at the least) before he received any compensation.
�70.05 per week should be enough to feed 5 people for a week. (It's perfectly possible to live on under a tenner per week, per person, for food. I've been doing it for the past few months!) However, I fully accept that there are many other household expenses to be met. The government also recognise this, which is why there are benefits available to assist you. Once again, I strongly recommend that you contact your local CAB, or JobCentre Plus, as soon as possible.
Chris