there are serious questions about the reliability of this material. it s not used by any other deep sea sub. this cladding that covers the carbon fibre though has been found. as has part of the landing frame from underneath the sub. another substantial piece is the equipment bay, which would have been covered by this tail cone. it contains the subs electronics and has suffered extensive damage. no one knows why the titan imploded, but it s hoped that this wreckage could?establish what went wrong. plans to mine battery grade lithium carbonate, which is a key component in electric cars, have been announced in cornwall. the proposal could create around 300 jobs and aims to supply 500,000 electric cars with lithium carbonate by the end of the decade. 0ur south west england correspondent jenny kumah has the details. china clay mining has played a big role in cornwall s local