Hi Gemma, i agree its an awful experience being burgled. It happened to me once and was shocking, afterwards i upgraded the security in the house and guess what, the buggers tried to get in again but couldn't, just as what has happened in your block of flats, if they know it's easy they will return. Use the deadlock everytime i would say and upgrade your security. If you didn't know already, Callow locksmiths on Lordship Lane provides security equipment and services, oh and buy a shotgun, theres a shop on Lordship Lane that sell 'pieces'. :)