Enough is Enough Teresa
So, the terrorists have, at last, worked out that their best tactic is small scale attacks that can't be defended against without completely disrupting normal way of life. Who needs bombs, or the internet, when a van, a knife and going to your local town at a busy time will be much more effective in causing death, terror and disruption?
There are only two things that can be done about this. Both are within the power of the government, should be obvious and should have been done before now: 1) more police on the streets (both in target areas and in the community), and 2) addressing the source of the problem: the disaffected and violent attackers.
May is trying to a) blame everyone other than herself, and b) find a technological solution to a non-technical problem. More police in back offices, more surveillance, more GCHQ wizardry, changes by "internet giants", harsher punishments, internment will all have zero effect. The people doing this are extremely highly motivated, do not expect to survive (let alone be punished) and do not require specialist support (e.g. bomb-makers) or communications (secret or otherwise). None of the things May is talking about, or has done as Home Secretary or Prime Minister, will have any effect at all on this type of terrorism.
The real fix is to stop creating disaffected and motivated killers by channelling their energy, concern and commitment into a more positive activity. When a jihadist returns from Syria, don't throw them in jail (to radicalise others. become even more radical themselves, and build up all the contacts they need for future violence): work with the community to turn some of these highly motivated and committed returning fighters into community leaders, journalists, lawyers, activists and politicians. Channel that energy to fix what they see as the problems of society into a desire to solve the problem instead of destroying society.
Of course, it won't work with everyone, which is why we need police on the streets and very hard work to make sure the community do not endorse or even permit violence.
Spend money in the communities. Reduce poverty. Address the grievances and concerns. And remember that violence has always been with us, always will be, and is at an extremely low level now compared with both recent and longer term history.
And give up magical thinking that technology either causes or can help reduce this.