Restricting it to objects moving SE to NE or N I can find a couple of possibilities in CalSky. I saw something myself from Castle Hill in that part of the sky but it didn't get noticeably brighter while I was watching. It seemed "just another satellite". There don't appear to have been any Iridium flares at around that time.
Astro F (28939 2006-005-A) was my best fit for time and course.
Cosmos 2261 Cat:22741 1993-051A was predicted to decay around then but there was no course prediction for it. If your target brightened and then completely vanished that might be it.
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