David and Samantha Cameron at Witney vote count

David Cameron arrives at an event, meeting his agent and Conservative Party members. The verification of election papers is nearly complete, and counting is about to start. Cameron is seen posing for photos, appearing relaxed despite conflicting exit poll results. He awaits more solid results to determine if the projected figure aligns with the majority needed.

What are the conflicting stories mentioned in the text related to?

What does the projected figure of 305 from the exit poll indicate?