Meanwhile TV production company Sunset + Vine are favourites to win the tender for Channel 4 racing ahead of current partners Highflyer .
TV production company Sunset + Vine supplied the final Grand National coverage for the BBC with a 10.1 m peak .
Meanwhile TV production company Sunset + Vine , who supplied the final Grand National coverage for the BBC with a 10.1 m peak , are favourites to win the tender for Channel 4 racing ahead of current partners Highflyer .