S.2501
Swindon MAS Stage 2 - Wootton Bassett West to Thingley Junction
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The second stage of the MAS scheme is described in notice S.2501, which had published implementation dates of Saturday 3rd December to Sunday 4th December 1966 and concerned the Wootton Bassett to Thingley Junction area.
Chippenham East and Langley Crossing Boxes were closed and all the signalling removed. The junction at Thingley was altered in readiness for MAS with the removal of one of its facing crossovers and replacement with a trailing one (that would eventually form part of the junction with the Melksham line (to be singled).
Continuous Track Circuiting (CTC) was installed a Track Circuit Block (TCB) applied between Wootton Bassett West and Thingley Junction. Wootton Bassett West (working absolute block to East) thence lost its ability to switch out.
Full details in the Swindon MAS Stage 2 page.