An anytime day return from Woolwich Arsenal to Cambridge costs £36.30 An anytime day return from King's Cross to Cambridge costs £35.80. Therefore for travelling from Woolwich Arsenal to Cambridge, the first fare is the obvious choice. But can I simply use the DLR to commence my journey and go to Bank, then Northern Line to King's Cross? Or do I have to take the rail service to London Bridge and change there? The DLR route is much my preferred option for getting to King's Cross in the morning peak. Thanks in advance.