Jerry - you suspect wrongly. Had I been thinking of those, I would not have entered a discussion about 2MTs. Please credit the rest of us with a little intelligence and knowledge (although, of course, we accept that we may not match your level in either of those areas).
Then I am afraid that your references are incorrect. We have established that we are talking about the Ivatt 2MT 2-6-2 tanks in the number series 41200 - 41329. That's 130 of them, generally referred to as ex-LMS locos although in reality that only applies to the first 10, the remainder not being built until after nationalisation. As you have made clear, we are *not* considering the BR derivatives numbered84000 - 84029, or any flavour of 3MT or 4MT tanks, of whatever wheel arrangement.
At various times, the LMS-designed Ivatt 2MT tanks have been used throughout the former Southern Railway / Southern Region from Kent to Cornwall. Your claim that they were of no use to modellers of the Central or Western sections is incorrect. They were regular performers on lines in Surrey & Sussex in the area between Guildford & Brighton. Further west, I believe they worked on the Lymington & Swanage lines, although I stand to be corrected on that. They were certainly no strangers to the S&D "main line" (and, of course, "the branch" to Highbridge etc.) and they knew their way around Weymouth Quay. In the WestCountry they saw service on the coastal branchlines to Lyme Regis, Seaton, Sidmouth & Exmouth, the Callington line from Plymouth, and the network of lines in North Devon and North Cornwall generally referred to as "the withered arm". They were used in southeast London, on cross-London inter-regional trains and on station pilot duties at Waterloo. Southern region allocations over the years include: Ashford, Barnstaple Junction, Bath (Green Park), Bournemouth, Bricklayers Arms, Brighton, Eastleigh, Exmouth Junction, Faversham, Guildford, Highbridge, Nine Elms, Plymouth (Friary), Ramsgate, Salisbury, Stewarts Lane, Templecombe, Three Bridges, Tunbridge Wells, Wadebridge, Weymouth, Yeovil. Apologies if I've missed any out of that list.
So, Jerry, as I said - your claim that they were only used in East Kent was indeed "Yet another totally incorrect statement from Jerry". It doesn't always pay to be dogmatic, intolerant and abusive - it leaves you vulnerable and erodes your credibility. Perhaps you should take your own advice and "Cite shed codes and working rosters / WTT to back you assertions up".