This was a no sleep night. Woke up at 2:30 AM and checked the forum.
I Researched Trianco and got quite an education. This is primarily a UK floor standing boiler and fireplace insert that supplies hot water for domestic or primary hydronic heating. It seems like you can have any color you want as long as it's white. I did get a lot of information on smokeless coal fuels for use in gravity fed boilers and furnaces. It seems the most popular fuel for the Trianco is the anthracite "grains." Judging from the size it appears to fall between a large US sizing of anthracite rice and a small buckwheat size. I could find nothing on how it feeds, shaking or riddling the grates, photo's of the grates. The grates are called fireplates. I couldn't find any photo's of the insides, grates, gravity feed system, nothing. They seem to be very stingy with internal photo's.
The exact same TRG models appear to have been around since the early 1960's. Your model new averages around 3,000 pounds or at the current exchange rate $4,990. It has a 5 year warranty and is sized out at 80,000 BTU's or 23KW.
If this is truly a redfire then it's a lot older than the 1960's. I also found that Trianco no longer exists. It was founded in 1850 and was purchased by TR Engineeriing Limited in August of 2010. I did find that you could contact TR Engineering as listed below.
TR Engineering Limited,
Tel: +44 (0) 114 257 2300
Hope this helps.
New Beginning Church
Ashland Pa. 17921