Let's just hit some simple facts about No Deal that nobody can argue with:

No Deal puts us outside of the EU's external tariff system.

That means that where there were zero tariffs, British exporters will suddenly face tariffs.

We don't have any other deals yet, so we won't be making up for the lost profitability elsewhere.

UK exports suffer.

Simple.

Radioactive material present serious safety and security risks.

Therefore transporting them comes under the EURATOM programme.

We don't make the radioactive material use in cancer treatments here.

No Deal ends our primary supply route for treating cancer.

Simple.