Signal A (controlled) (J1+2) 4 Aspect Signal B 3 Aspect Distant Signal C (auto) 4 Aspect Signal A with junction indicator 1 takes you to signal B which is a distant. Typically you wait at Signal A until the fast clears signal C. Signal A then steps up to 2Y. What has suddenly started to happen is that Signal A now clears to 1Y. Suffice to say it's caused a little bit of confusion. The signal was challenged as it appears as an incorrect sequence and Signal A has never shown a single yellow until now. Clearly it's possible as its happening but wouldn't this need specific intervention from the Signaller to set the correct route and to specifically set it as a single yellow ? My initial assumption is that because this signal causes delays as it takes a train to clear signal C before it can step up, this is being done to improve performance. For Signallers and people who know about interlocking etc. This is for Victoria box. Cheers as always.