My understanding is that the ties test still apply.
Therefore the more ties, eg wife, kids house you are able to stay in etc, then the more likely you are to be classed as being resident.
You would be well advised to contact a tax adviser to check on your own individual circumstances.
You will need to advice HMRC of your change of status., but the good news is they will take account of split years so you may get a rebate.
The HMRC have a help booklet which will guide you through the process. It comes a at the process from the point of you you wish to be resident!