What the future holds, we can only wait to see. The organisers, Giant Chess, are committed to resuming the series of great Southend Chess Congresses as soon as this is possible.
So long as social-distancing is in force, over-the-board chess is not practical.
Of course, if the virus returns next year, we may find ourselves in the same position. Logic suggests that normality will only return when a Covid-19 vaccine is available.
In the meantime, keep safe and stay well.