Streeting has probably decided it is now or never. Labour is highly unlikely to win the next election and there is a good chance he will not be an MP, defending a majority of only 500 in Ilford against an “independent”. Otherwise, by the time he is in a position to challenge again, he may well be yesterday’s man.
His only chance of holding on to Ilford would appear to be persuading enough Conservative supporters to tactically vote for him.