Take your pick but note the SRS one lacks a boiler:
https://www.ebay.co.uk/itm/LIVE-STEAM-FLYING-SCOTSMAN-2-1-2-GAUGE-3-2-5-INCH-METHS-FIRED-LOCOMOTIVE/264669791266?hash=item3d9f8c8422:g:-gYAAOSwNvBeb9O7 (https://www.ebay.co.uk/itm/LIVE-STEAM-FLYING-SCOTSMAN-2-1-2-GAUGE-3-2-5-INCH-METHS-FIRED-LOCOMOTIVE/264669791266?hash=item3d9f8c8422:g:-gYAAOSwNvBeb9O7)
https://www.stationroadsteam.com/2-12-inch-gauge-lner-pacific-owen-tudor-stock-code-7825/ (https://www.stationroadsteam.com/2-12-inch-gauge-lner-pacific-owen-tudor-stock-code-7825/)
Either may of course provide the answer to the what will you be doing for the next few months question.
ebay one sold but another has appeared:
https://www.ebay.co.uk/itm/LIVE-STEAM-2-5-GAUGE-LNER-4-6-2-CLASS-A3-LOCOMOTIVE-4472-FLYING-SCOTSMAN-nv/333553933152?hash=item4da95d1b60:g:hKYAAOSwETxedb9A (https://www.ebay.co.uk/itm/LIVE-STEAM-2-5-GAUGE-LNER-4-6-2-CLASS-A3-LOCOMOTIVE-4472-FLYING-SCOTSMAN-nv/333553933152?hash=item4da95d1b60:g:hKYAAOSwETxedb9A)
Commented too soon whilst the ebay meths fired one showed as sold it has reappeared at a lower price:
https://www.ebay.co.uk/itm/Live-Steam-2-5-inch-gauge-flying-scotsman/264646365754?hash=item3d9e27123a:g:hKwAAOSw6Fped2nK (https://www.ebay.co.uk/itm/Live-Steam-2-5-inch-gauge-flying-scotsman/264646365754?hash=item3d9e27123a:g:hKwAAOSw6Fped2nK)