Being considered by many as the Supporters' Association flagship engine following the Un-Loch Your Cash appeal beginning in 1998, No. 4 Loch re-entered service in 2001 when the ocassion was marked with a special train to Santon Station (then the temporary terminus).  When it became apparent that the locomotive required re-tubing during 2009 it was decided to fund the cost of these new tubes from the general fund. The locomotive saw little use during this season and in the winter the old tubes were removed, with new ones being fitted in early 2010 and steam trials taking place shortly thereafter.

By the start of February she was in light steam for testing purposes and another successful Supporters' Association project came to fruition.  Following these tests the locomotive undertook its first rostered service, with a special out-of-season charter train to Ronaldsway Halt as part of a 1940s themed evening.  The accompanying image shows the front tube plate of the locomotive prior to the instalment of the tubes in question.