I have a Sony Bravia TV purchased from Currys in December 2018. It worked perfectly until a day ago, when for some reason BBCiplayer no longer works - the site can be accessed, but the programmes refuse to load up, with the message "something went wrong loading this programme". There is a similar problem with My5, although unfortunately it doesn't seem to affect the adverts.

This problem seems to have existed in the past with other correspondents, and I have tried all the previous remedies - un-plugging TV, internet, going through the initial set-up and restoring factory settings (twice) - but all to no avail. As there is no problem with the iplayer on our other TV (a Toshiba), the issue must be with the TV.

Why has this problem suddenly arisen, and what is the solution?