I don't think that using the Navy is practical at all. The only way to stop it is to somehow get at the criminals who make vast fortunes by exploiting human misery- an old old story. I don't know how that would be done though.
The way to stop this is very simple. If France would agree to take back immediately anyone attempting to cross the channel and anyone who reaches the mainland via the channel, then you would be right. That takes away the incentive of the people smugglers because if it is known that you would be sent straight back then there’s no point in paying them to bring you over in the first place. No profit, no service.
France would also benefit as it then wouldn’t be the staging post for people to try to get to the UK and you wouldn’t have the migrant camps in the French coastal towns, nor migrants entering France just to get to the UK. For a short while they would have a number of illegal migrants returned to them but the flow would very quickly stop when the illegal migrants realised they were not going to get into the UK by illegal means. I would be happy for the UK to pay towards the cost of this initial period, because it would be very short.
The problem is that France have repeatedly refused to agree to this, which I don’t understand.
I’m hoping that the Navy will be used to detect crossings earlier (while they are still in French waters) and then alert the French authorities and thus put more pressure on them to fulfil their legal obligations to control the boats crossing the channel illegally.
I agree that the Navy cannot engage in physically stopping boats, trying to turn them around, push them back etc and I think that it is accepted that that is impractical by pretty much everyone.
My hope is that the Navy will be used to put the onus on the French and further highlight their lack of cooperation in dealing with this effectively. If that is the case then that would be a perfectly reasonable course of action and thus
would stand up to scrutiny and would have the support of the vast majority of
ordinary members of the British public. Those that would just allow anyone in and those that have an agenda to criticise the government (whatever party that may be) will never be won over of course, but it’s the will of the majority that should count.