This is a two part study to investigate the safety and anti-tumour effects of standard chemotherapy, plus an investigational drug (CDP791), in patients with advanced non small cell lung cancer.~In part one, patients receive carboplatin and paclitaxel chemotherapy together with one of 2 doses of CDP791. The main aim of this part is to investigate safety and tolerability of carboplatin/paclitaxel plus CDP791.~If part one confirms that the combination of drugs is safe and well tolerated, 156 patients will enter part 2. They will be randomized to receive either carboplatin/paclitaxel (C/P) alone, or C/P plus one of 2 doses of CDP791. The main aim of this part of the study is to compare the anti-tumor effects of CDP791 plus C/T with those of C/T alone. Participants will receive up to six cycles of chemotherapy with or without CDP791. Those whose disease stabilizes, or responds, will be eligible to continue to receive CDP791. Participants in the C/T alone arm whose disease progresses will be eligible to receive CDP791 monotherapy.~Participants will be followed up longterm, so that survival can be measured.
A 2-part study to examine safety, tolerability and pharmacokinetics (part 1), and anti-tumour effects (part 2), of CDP791 combined with carboplatin and paclitaxel.