The following submission statement was provided by /u/noelcowardspeaksout:

Lots of fusion plants are energy positive for fractions of a second. This plant, due to improvements in magnetic field density, is actually designed to harvest that energy, turn it into electricity and to supply the national grid with power.

Please reply to OP's comment here: https://old.reddit.com/r/Futurology/comments/y1akde/uk_to_build_first_grid_connected_fusion_power/irw764x/