According to the latest Heritage Railway magazine:
The 1938 Stock tube train hopefully be back in operation in Feb.
The 4TC is at Eastleigh having work carried out, including new livery.
Former LMS Engineers Saloon no. 45029 is owned by TfL and being restored at Eastleigh.
20142 is planned to haul the 4TC and 45029 from London to Quainton Road for the Buckinghamshire Railway Centre Spring Gala.
Met 1, a Pannier Tank (probably 9466), Sarah Siddons, the 4TC & 45029 are pencilled in for Steam On The Met between Wembley Park and Watford on the first two weekends of September.