Victims of the Westminster Bridge, London Bridge and Finsbury Park terror attacks can expect lifelong compensation they would have otherwise been denied had the terrorists struck days or weeks earlier.

An obscure legal change made just three weeks before the first atrocity in March means they will have the full cost of their care paid for by the motor insurance industry, rather than relying on notoriously stringent Government lump sums.

Legal experts have hailed the “immeasurable foresight”, which should enable multi-million pound packages for ongoing physical and mental support, compensation for loss of earnings and substantial pay-outs to families of the dead.

Fourteen innocent people were killed and more than 100 injured in the three attacks in March and June this year.

The injuries suffered by the majority of the surviving casualties were caused by vehicles deliberately used as weapons.

Before March 1 this year, the Motor Insurance Bureau (MIB), an insurance industry fund to help the victims of untraced or uninsured vehicles or drivers, had imposed an exclusion in cases of terrorism.