alt Hacker NewsLet's imagine a hypothetical symmetrical war between two modern countries. One can disable the other's satellites and maintain their own fleet. The other can't get access to any third parties' satellites.
You aren't going to send your steel navy out when one side can see you from space and you can't, almost regardless of the numbers. Your big army of steel tanks is useless against a bunch of drones directed by distribute satellites.
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In a defensive war, a steel navy sitting in spitting distance of your shores and an army of steel tanks will still do a lot to keep the enemy at bay. And you can swap the tank turrets for Gatling guns on some of your newly produced tanks to help against drones
You wouldn't be able to win the war in your scenario, but you could still do a lot to make sure the other side isn't winning either.
Everyone in this discussion seems to be forgetting Trident as well. There's a lot of assumption the next war will be helpfully similar to WW2, and some sort of reverse sweet spot where we are subject to naval interdiction but will not deploy the strategic nuclear deterrent, and at the same time have enough time to build things, but not things that require any of the rest of the supply chain than steel (I have bad news about the number of ASIC fabs in the UK).
Back to "dead men dominate UK politics". In this case, we're trying to refight a war from 70 years ago.