As Charlie said, I have been working on updating as many as I can as and when people point them out. I wasn't aware that the BSBI had anything other than their 2007 checklist plus a spreadsheet of changes/additions and the names in that spreadsheet didn't include authorities. There was talk that the BSBI would issue a new updated checklist, as per the 2007 list, which is why we did ad-hoc updates, but this hasn't been produced yet ... I think. I will have a look at the changes spreadsheet tomorrow and just see how many new names are missing completely - so we can get a feel for how many need creating. :)
Chris Raper, Manager of the UK Species Inventory, Angela Marmont Centre for UK Biodiversity,
Natural History Museum, Cromwell Road, London, SW7 5BD. (tel: 020 7942 5894)
also Tachinid Recording Scheme (http://tachinidae.org.uk/)