The GCA, led by Christine Tacon, looks at complaints from suppliers who fell they have not been treated fairly by the multiple grocery trade. Any submissions can be made at the Government website.
NFU food chain adviser Christine McDowell said: "The NFU recognises the success of the GSCOP and the GCA in changing cultural behaviours of retailers with their direct suppliers. The GCA’s annual survey results in 2016 showed the progress retailers are making in instilling the principles of fair dealing within their buying functions. The proportion of suppliers with issues fell from 70% in 2015 to 62 per cent in 2016, with Tesco and Iceland reported as most improved.
"Many of our members do not enjoy the benefits the GSCOP and the GCA bring, as most farmers and growers are indirect suppliers. This is why we are calling for an extension of the GCA remit to oversee the relationship between farmers and their direct buyers.
She added: "We also recognise that the ornamental sector is excluded from the scope of GSCOP currently, and are well aware of unfair trading behaviours, explicitly banned within the GSCOP, facing our ornamental grower members. We are in the final stages of submitting written evidence of these unfair practices into the GCA review and will be calling for the GSCOP scope to be extended to cover suppliers of ornamentals to retailers."