The makers of the BBC1 programme Ground Force yesterday accused an Australian television channel of producing a "carbon copy" of the show.
GMG Endemol is seeking legal advice about Backyard Blitz on Kerry Packer's Nine Network, which it regards as "a blatant rip-off".
A spokesman said: "Their show is exactly the same format as ours and even has a Charlie Dimmock. The only difference is that she is not as good-looking and keeps her bra on."
Anger over the gardening show comes as the Nine Network's main rival, Rupert Murdoch's Seven Network, prepares to start broadcasting a legitimate Australian version of Ground Force next month.
The programme achieves audiences of up to 12 million in the UK.
Peter Van den bussche, head of sales for GMG, said: "This shows a complete disregard by the Nine Network of all existing international format trade practices."Reuse content