The PM is quite right by describing the immigrants as swarms.
But he is wrong by just sending wire and dogs, troops need to be deployed, armed with water cannons and tear gas, or even rubber bullets, if the situation gets serious.
These immigrants must be made to realise that the UK does not want them and must be swatted down. It is a great pity that a large country like France cannot provide a remote island to house their immigrants on, like the Aussies have done.
Winston Churchill would have cleared this trouble up in no time.