Just to add a little to Ferdia's reply, you may find Charlton a bit of a pain to get to, being on the opposite side of London to Oxford. You might consider either of our south coast parishes at Bournemouth and Portsmouth. Depending on exactly where you live they are fairly easy to access via the A34 and M3. Bournemouth is every Sunday, and Portsmouth is the second Saturday each month, so this coming Saturday is our next Portsmouth Liturgy. Address and contact details are on the BOC website, but if it helps you can bell me on 078 7049 0085 and I'll do my best to answer queries or give directions.
With love and prayers,