your door needs re-packing,if you know any one who fits doors and windows ask them to do it for you,if not phone a double glazing repair company to do it for you as if you force your lock it will break and you will be faced with a bill of around £100.00-£160.00 instead of a charge of around £40.00-£60.00 to re-pack it.If you are going to try and do it yourself feel free to contact me through my website below
shaun www.sdwupvcrepair.co.uk
October 2008