Case for hyphenated version
Hi,
The fact that the words simple and uk joined up form the word eu in the middle and do not look clear to read easily, means that if it were to be developed as a site, the hyphenated version would be an advantage.
Simple-uk-loans looks better than simpleukloans and at least the 3 key words are going to be deciphered more easily by search engine bots, as well as the human eye. As the hyphenated version is still available, maybe you should register that too. However, if you have registered the name purely for resale as an undeveloped site, don't bother!