Add this item to the mix. It's another vote for LHR 3.
BBC News - £500m Heathrow link to cut times on Great Western line
A new link into the central area from Slough and pax from the West. Who's going to write off £500mill?
Amusingly, it's announced by our good friend Transport Secretary Justine Greening.
This extract contains two gems:
Stuart Cole, professor of transport at the University of Glamorgan, said the scheme would cut a sizeable chunk off journey times.
"The downside is that Cardiff Airport might become less competitive because Heathrow will be that much easier to get to," he added.
Welsh Secretary Cheryl Gillan said: "The Wales Office has always supported and recognised the importance of connectivity to Heathrow as a major UK air hub for Welsh business and Welsh passengers.
"The new rail link will not only provide a more convenient link, but will also be a key driver of growth for the region."