Swanage Mogul Tenders

Can anyone tell me the tender numbers of the three (or possibly four) tenders associated with the Moguls 31625, 31806 and 31874 that have arrived at Swanage. I know there have been swaps between the locos so I'll describe them as follows

Tender 1 Maunsell 3500 gallon. Frames currently dismantled. According to the Southern Mogul website the tank is to be transferred to the chassis of another tender. Also which loco was this tender attached to before it left Barry scrapyard? Link here to the Swanage Mogul website which describes the work on the tender near the bottom of the page

http://swanagemoguls.com/31874overhaul/

Tender 2 Maunsell 4000 gallon. New tank on the chassis of an old Schools tender snowplough (Anyone know what the number was of this snowplough)? The rebuilding of this tender was never completed. Picture here:

https://www.flickr.com/photos/50576...8aQ-9aJ2TX-pAPBPE-dLcApR-ed1uAB-nd8MEN-o9j14G

Tender 3 Maunsell 4000 gallon. Currently running with 31806. In addition does anyone know which loco this tender was attached to before it left Barry scrapyard?

I think there are only three tenders with these locos but have become very confused with the swaps hence the query at the start about a possible fourth tender ( I know 31806 ran with tender Maunsell 3500 gallon tender number 1892 in 2010/11 which is usually with U class number 31618)

 

Yes there were only 3 tenders, the one what runs with 31806, i believe finished its days coupled to an S15, as far as i know the one in herston has alway ran with the N, It hd a new tender tank made and fitted as the original was life expired, but the chassis is the original,
the tender meant for 31625,( it came from Barry minus tender), was a schools class chassis,and a new tender top but it was never assembled, because i believe there was problems with the tank so the original one off 31806 ( original flat coal raves, ) was rebuilt with inset schools class type coal raves, and used with 31625, and this is what may be causing the confusion, infact quite a lot of 31625 came off 31806 motion, and tender,

 

Martin, was it a 4000 tender, the one fitted with te u class is larger slightly than the 3500 type, the giveaway is the rounded corners of the back , if you look at the 3500 they are not so curved they may even be a straight 90 degree with no or very little curve, this type of 4000 type being i think a later build