I am one of the very enthusiastic and very helpful volunteers at the Olympic Park
. It's a fantastic atmosphere and you'll all have a great time!
dinasaw - you (or rather your mum) will definitely be able to use the Mobility service - free wheelchairs or electric scooters (bring photo ID to borrow one), or a little golf buggy thing driven by a volunteer. Just ask any volunteer to point you towards where to get these once you get through security.
transport - I've been very pleasantly surprised about how well the transport is working. The Javelin train from St Pancras International to Stratford in 6 mins (and very frequent departures) is particularly good.
security - yesterday the queues for security at the Olympic Park were between 5mins and 20mins, so pretty good. And we were trying to direct people to the shortest queues whereever possible (there are about a billion security lines).
liquids - please don't any (or drink up before you get in). Don't bring your forty quid bottle of expensive aftershave
. Bring an empty bottle to fill up at the (free) water fountains inside (or pay for expensive bottled water).
children - everyone I was volunteering with loved welcoming families. Especially ones in GB colours / wigs / flags painted on their faces etc. The Olympic Park is huge and was pretty crowded yesterday, so factor that in if you are walking between venues with small children. Definitely may be fairly long queues for food, so bring a few snacks (or sandwiches).
I am there practically all next week so may see you (bring a packet of PomBears and I'll let you through security double-quick
).