What is it?
Streetcar is pay as you go driving. You book 'streetcars' dotted around london on an hourly basis and only pay 6pounds per hour driving. You get a daily 30 mile allowance.
You don't have to worry about MOT, insurance, parking permits, petrol, cleaning etc etc.
In conjunction with Oyster, streetcar are offering 2 for 1 annual membership. that's a saving of £49.50. Total cost to you is only £25 when split between 2 people.
Simply select 'Oyster' when asked how you heard of them. See direct link for more details.
My girlfriend and I both use them and they're great for infrequent drivers needing to make the odd trip here and there. There are streetcars just down my street. Wish i knew about this deal when i signed up last week. Their fleet are all brand new VW Golfs.
You can see whether there is a streetcar near you by looking at http://www.streetcar.co.uk/locationslist.aspx
and punching in your postcode.