Train doors atwere not proven closed at Rear DT 'B1' door. TC recycled train doors once and fault cleared. Fault recurred at other stations. Staff(CCK) checke d confirm gap when closing train doors. Staff proceeded to i ~~~~~ Train doors at  were not proven closed 3603 B1.   FC-932 B1 door CLE close operation timeout. Open Close speed pass: Y FOD found: N Door cycle 20x: Y Rubbing marks: N Door Push/Pull force: Satis Door mating gap: 61mm, out of criteria. Door Lock Switch red line when door closed: Satis Door Lock Switch Cushion Rubber intact: Y Door Close Switch distance from actuating plate: Satis Door Wobble: N Found door operation smooth. Found mating gap 61mm. Adjusted to criteria (63-64.5mm). Checked guide rail, J rail satis. No sign of wobbly door. Done by Jack. 13/12/2023.