I received exactly the same kind of contract letter from this doctor daisuke kaito and his immigration lawyer diana maher. If you have received the same kind of contract letter from the said U.K based employer, you might want to consider checking this link out:

http://www.eslteachersboard.com/cgi-bin/scamalerts/index.pl?noframes;read=1200;expand=1

If you search on Dr. Daisuke Kaito, there's not much info you can get about him because I think he changes his name from time to time. So I'm calling all other people who have received an email from this person to warn other people as well by replying to this post or putting a shout out about it in your facebook. People who have received emails from this employer will find similarities with the emails other people received from the link above.

Someone also gave me the following links that you might find helpful as well in spotting scams:

http://www.nursingguide.ph/article_item-676/DFA_Advisory__Beware_of_Fake_Online_Job_Offers_for_Nurses_in_UK.html?utm_source=WA-Newsletter-February-01-2011&utm_medium=email&utm_content=DFA%2BAdvisory:%2BBeware%2Bof%2BFake%2BOnline%2BJob%2BOffers%2Bfor%2BNurses%2Bin%2BUK%2B&utm_campaign=WA-Newsletter-February-01-2011

http://www.nursingguide.ph/article_item-678/Groups_of_Filipino_Nurses_in_UK_and_Ireland_Warns_Against_Online_Scams.html?utm_source=WA-Newsletter-February-01-2011&utm_medium=email&utm_content=Groups%2Bof%2BFilipino%2BNurses%2Bin%2BUK%2Band%2BIreland%2BWarns%2BAgainst%2BOnline%2BScams%2B&utm_campaign=WA-Newsletter-February-01-2011

I've also found this info from the facebook website of the British Embassy in Manila helpful in telling signs of a possible scam:

Facebook website: http://www.facebook.com/ukinthephilippines

Filipinos who wish to travel to the UK for any reason should know that all visa fees are paid in the Philippines, not in the UK. All UK visa applications for Filipinos are lodged at the local Visa Facilitation Centre in Makati City, Philippines. If your prospective employer asks you to send money overseas for visa processing or work permit, please exercise caution as this is a possible indicator of scam.

Genuine UK companies are registered and can be checked on www.companieshouse.gov.uk. UK company addresses can be checked on www.upmystreet.com.uk.

More information about working in the UK can be found at the UK Border Agency website: http://www.ukba.homeoffice.gov.uk/workingintheuk/

Hope this helps. I've also attached here pictures of the apartment he said I would stay in. I think bottom line is, if it is too good to be true, it must be false.