"Big Dave" wrote in
ups.com:

CJB wrote:
Just to be awkward the Connect services were only going from Heathrow
to Hayes over the weekend. There were a lot of pi$$ed off tourists with
heavy luggage having to change to FGWL Thames trains at Hayes!! But
I've never seen the Connect services so full. Normally they do the
Hayes to/from Heathrow section all but empty (not surprisingly bearing
in mind the cost). CJB.

If FGWL were still running what sort of works were going on, overhead
wire works?


Not sure about Saturday but the relief lines were blocked from Southall
inwards on the Sunday until about 16:00. Connect running hourly to
Paddington plus an hourly Heathrow T123-Hayes short which appeared to be
turning round on the up relief line.

Whatever work was going on wasn't obvious to the naked eye.