P453 ORACLE 453 Sat29 Jul C4 2201:11 4-TEL Channel 4 Daily       06.48, 07.48, 08.48 Monday morning Box Office starts the week with an interview with the director of Southend's new pier museum, opened to celebrate the pier's 100th birthday. Eve Arnold reviews a new exhibition of the world of photojournalist Robert Capa in the company of Robert Ang. Plus Jaci Stephens' TV preview, now a fortnightly feature on Box Office, in which she deals with I Love Lucy and Tales From The Hollywood Hills among other delights.  Guild Open College Follow-Up Racing