UK Transfering Money from my Sole Trader to my LTD company

[glasshouses]

Hi all, i own two businesses and my wife owns one, im wanting to transfer some funds from my Sole Trader business to my new limited company as start up capitol. i know i can do this by clicking my mouse between my accounts but what does this get recorderd as? a loan or service and do i need to raise an invoice from my ltd to account fr the money? please help.

lyndon