From Seatguru.com:

LHR to EWR NonStop has BusinessFirst and Economy on 757 or 777.

From Continental.com:

100,000/250,000 for BusinessFirst saver/regular roundtrip (return) award flight using Continental miles. You'll be responsible for taxes.

If you have a Sapphire or Ink card, you can transfer your Chase Ultimate Reward points to Continental 1 to 1.