if I remember correctly you are with them in the area on the saturday - so showing them the best entrance would be advisable. There are many 'main road's in the Waterloo area with tube entrances on them.
. . . Theres a whsmith on the route stand there.. . .
ermmm - I do not think that there is - I do not think that there is a whsmith in the underground concourse although there is a newsagent. The bit about turning left and decathlon is spot on . . .
. . . Stick to the left side of the road . . .
A little ambiguous - I think you mean the left side of the marathon route. It could mean the left side of the road as they walk from the station. (not that it really matters if they do that.)
. . . Exit station find a spot . . .
I would still advise using the west rather than the east exit. Less crowded - particulalry when they have to get back in.
. . . westbound I think . . .
YUP - westbound 20 min on the tube plus ??? min to get onto the station on marathon day. (Might be lucky and ??? ~ 0min)
. . . . Exit and find a spot on left of the route . . .
Tricky - the obvious exits from Westminster put them on the right hand side of the route. Getting to the left side of the route is a less obvious exit and an underpass. I would suggest . . . right hand side of the route and 100m or so before the route makes the 90degree right hand turn at Big Ben.
. . . a mile market sign or bridge that goes over . . .
This would be about 400m before the right hand turn. The 25 mile marker is just after the rail bridge going into Charing Cross. Again as you are inthe area on the Sat (?) you can walk over a footbridge alongside the rail bridge and designate an optimal spot (or rather area alongside . . )
. . . If you stay at the viewing point near. . .
Good plan - but I would use the baggage lorries as well to make sure you have something warm and dry to change into before going looking for them. Also have a back up meeting point (your hotel) in case of incident, conjection or confusion.
Come to think of it - if you are inthe area on Saturday & going to collect your number you could visit all of the locations with your relatives and be clear about the areas (not the precise point) where they might try to be. The best way to ExCEl for your number is to take the Jubilee line to canning Town & xfer to the DLR.
O2 isn't too stupid an idea - come south through the Blackwall tunnel and take the very first exit. I do not think that there will be any road closures. Then after the finish take the Jubillee line back to the O2 from Westminter tube station. (Cheap tip - park near the Pilot Inn and save the car park fee!)
Then back north through the Blackwall tunnel, carry on on the A12, A406, M11, M25, M1 . . .
I would imagine BlackFriars would be rammed - but no direct knowledge.
Canary wharf - you step onto the platform and then onto elevators which are in line with the platform onto the upper concourse. Hence linear - no twisty turny corridors to confuse you. on the upper concourse go for the exit elavator in the direction you have just arrived in. Coming back use the same entrance you exited from.
Taxis are really not an option in central london on marathon day - too many roads closed, diversions and conjestion.