We've just been sent the following from a source in TfL with regards to possible Tube service levels during the strike. Take them with a pinch of salt:
o Jubilee – no more than 25% running
o Northern – 50-60% running
o Piccadilly – Extreme ends only but not including Heathrow.
o Bakerloo – May be able to run 20% service on Wed; possibility of running Wembley Central to Baker Street.
o Central – 40-50% of services, perhaps between White City/Ealing Broadway to Epping.
o Metropolitan – 20% max; due to signalling Aylesbury branch of Chiltern Line could be affected.
o City and Hammersmith – 13 trains.
o District – Less than 20%.
o Waterloo and City – unlikely to operate.
o Victoria – unlikely to operate.
More info if we get it.