Currys, Dixons and PC World are to stop stocking analogue televisions and will instead promote "integrated" sets with built-in digital Freeview tuners.
The chains said more than 90% of the TVs they sold were already digital.
The move was welcomed by Digital UK, the body managing the analogue switch-off, which will finish in 2012.
"Retailers of all sizes have a vital role to play in ensuring their products and their customers are ready," Digital UK chief executive Ford Ennals said.
A major push to inform viewers about the move to digital began last year, when Whitehaven in Cumbria became the first area to have its analogue signal switched off.
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