Graham Burrows from the Sea Life Centre in Birmingham describes what a surprise it was to come across the two new arrivals.
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The Ministry of Defence has named the engineer killed in the Red Arrows crash as Corporal Jonathan Bayliss.
Mrs May and Mr Corbyn both paid tribute to the RAF engineer who died after a Red Arrows jet crashed at RAF Valley on Anglesey yesterday.
The Oscar-winning director filmed part of sci-fi film Real Player one in Digbeth in 2016.