Why are we creating HST speed boards for this route? The only section ever likely to have seen a HST will be Oxford to Bicester (and High Wycombe). The section beyond Bicester to Bletchley will (almost) never see one.From Oxford Parkway to Bicester (and beyond to Bletchley) is 75/HST 100mph. It will see 10tph (both ways) when you add in 2tph to MK and 1tph to Bedford; 11tph with freight.
Surely they should IEP boards? Whats special about a using a HST Speed Board that isn't done by something more modern?