Hi Brian1888
Yes it will be a full new claim. When you go over £16k your UC claim will cease including LCWRA, when your savings go below £16k you can apply again for UC, unfortunately your LCWRA will also cease and you will have to start the assessment period again.
You need to seek specialist advice from your local Welfare Rights Organisation:
advicelocal.uk where they can take all your circumstances into consideration when giving you advice, there may be a way around your dilemma.
Gary