Fortunately her owner had sensibly got her neutered and microchipped. (Hopefully owner has contacted microchip company and checked that they have owner's correct contact details).
Her owner has put details on Animal Search
Animal Rescue charities like The Scratching Post recommend that it's vital for cats to be neutered and microchipped. Adult cats enjoy catflap access to a back garden and and they need catflap access to get back inside their home. They advise locking the catflap at night so that cats are safe inside at night as it reduces the risk of them getting lost or injured.
Thanks for helping Abi.
Looks like the found cat is described as not chipped and not neutered so not this cat.
Good news - apparently Lyra was found today.