What a curious concern. The Institute is already only metres away from St. Pancras with all its 25kV wiring and the Thameslink tunnel is almost underneath. The sub-surface lines are only the other side of the British Library. What difference will Crossrail 2 make?
That's exactly what struck me. A twin-track railway deep underground, using 25 kV AC, can't be hugely worse than a big station next door or a sub-surface line using 750 V (bigger currents) and
DC▸ (harder to screen). Worth doing the sums, but if it does threaten to upset the machines then shoot the Crick's designers, not Crossrail's planners (who say they can build in a bit more screening just to be helpful anyway).