South Croydon Bridge Club is bases at South Croydon Sports Club too.  It runs a friendly dupliate on Wednesday day time and more experienced duplicates on Thursday and Friday evenings and Saturday Afternoons.  It's EBU affiliated so you can gain local points.

Purley is a popular, friendly bridge club suitable students who have passed the beginner's course.  It's not EBU affiliated so you can't get local points for winning.

Kenley is a small and frindly EBU registered bridge club that meets on a Monday evening.

Join BBO for free and sign-in, choose "List All Tables", "All Public and Private Clubs", "Acol Bridge Club (Public)"

Bridge Barron is great value.  You can improve your play on your Android Phone or iPhone with this application. In the settings you can switch to Acol with three week twos by choosing "Mordern Acol".

No Fear Bridge is a subscription site that many of my students have enjoyed.  It has resources for beginner's although the version of Acol it teaches is slightly different from ours.
You can sign up for one month's free membership.

After than I have negotiated a 25% discount for Surrey School Students for your first year's membership:

First log in. 

Then click 'My Account' button. 

Select a one year membership from the list and enter the coupon code (email me for the code).

The discount is applied on the checkout page.