A realisation that there are advantages in being self sufficient, and not relying on other countries to control our food, water, power, and material needs.
Yes, we need raw materials, but there was a time, a long time ago, when Britain could manufacture things. Yes, and a lot of air pollution as well, before anyone mentions it!
Would you rather fix that water leak, or wait until a plumber has time to come round, next week, and do a simple soldering job?
Hopefully, we may even find that we have attributes that we had forgotten, or did not even know we had.
Howard