Red Diesel is almost Identical to road diesel just with a dye added, it can however have a lower centane rating causing a slower combustion and it may have more sulphur in (not a bad thing). You should be able to use red without any problems
The only thing I would say is that you change you fuel filter more regularly. Red diesel seems to be delivered to farms etc, in some cases containing dirt and water. Modern Tractors comply to tier three emissions now and many manufacturers are using common rail engines that are actually very particular on fuel quality, they have very complex fuel filtration and water separation to prevent any failures, the newer tractors I work on have a centrifugal water separator incorporating a filter and a further water-trap / filter and finally another finer filter.
Just one last point, British red diesel does not actually meet the manufacturers spec for the engines in the tractors. But saying that it does not cause many problems.
CONDITIONS FOR VEHICLES USING RED DIESEL ON-ROAD
Agricultural Tractor:
Designed for use off-road and used solely for purposes relating to agriculture, horticulture, forestry or verge, hedge or tree trimming bordering roads.
Agricultural Materials Handlers:
Designed for lifting goods or burden and for use off-road. Used solely for purposes relating to agriculture, horticulture, forestry or verge, hedge or tree trimming bordering roads.
Light Agricultural Vehicle:
Weight not exceeding 1,000 kg, single seat, off-road design and construction and used solely for purposes relating to agriculture, horticulture or forestry. Must be licensed (VED) as Limited Use.
Agricultural Engine:
Designed for use off-road and used solely for purposes relating to agriculture, horticulture, forestry. Only used on road for going between places where used for these purposes, and not carrying a load other than is necessary for its operation. Examples would include self-propelled sprayers and combine harvesters.
Agricultural Processing Vehicle:
Designed for use off-road and used solely for purposes relating to agriculture, horticulture, forestry. Designed and used for conveying built-in machinery for use when the vehicle is stationary. Only used on road for going between places where used for these purposes, and not carrying a load other than is necessary for its operation. Examples would include self propelled feed mills or seed dressers.
Unlicensed vehicles not used on public roads:
Must be declared SORN (Statutory Off-Road Notification) and not taken on public roads.
Vehicles used between different parts of land:
Only used on-road for purposes relating to agriculture, horticulture or forestry, and for moving a maximum distance of 1.5km between
land owned by the same person. Must be licensed (VED) in the ‘Limited Use’ category.
Mowing Machine:
No conditions.
Gritting Machine:
Constructed or adapted for, and used solely for gritting etc. to deal with frost, ice or snow.
Snow Clearing Machine:
Being used, or travelling to or from a place to be used, for snow clearance on public roads.