Britain can recover from the self-harm of Brexit. Today’s return to the EU’s Horizon project shows how | Simon Jenkins

Polls suggest a majority of Britons regret our exit. Rejoining the scientific programme could be the start of something bigger

Is this the dawn? Have we reached the glimmer of a new beginning? Rishi Sunak's about-turn on joining the European Union's Horizon programme is a first note of sanity in the two and a half tortured years since Britain formally left the EU. Let it not be the last.

The story itself is miserable. Horizon is an 81bn continent-wide programme to give Europe's scientific research community a critical mass to compare with that of the US or China. It acknowledges the obvious truth that advanced scientific research needs collaboration rather than competition. Britain's universities had been leaders of the pack, and they were among Horizon's principal beneficiaries. If anything made sense of a united Europe, it was Horizon.