Task: Phone Number Clean Up

n8n workflow:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"DataFilter","type":"n8n-nodes-base.functionItem","position":[770,290],"parameters":{"functionCode":"item.cleaned_phone = item.mobile.replace ( /[^0-9]/g, '');\nitem.cleaned_phone = item.cleaned_phone.replace( /[0]/, '44');\nreturn item;"},"typeVersion":1},{"name":"Set","type":"n8n-nodes-base.set","position":[600,290],"parameters":{"values":{"string":[{"name":"mobile","value":"07000 111111 Mr"}]},"options":{}},"typeVersion":1}],"connections":{"Set":{"main":[[{"node":"DataFilter","type":"main","index":0}]]},"On clicking 'execute'":{"main":[[{"node":"Set","type":"main","index":0}]]}}}