Miles trundle by as we journey back north, leaving behind the lush green fields of the tea plantations and soon passing again through the metropolis which is Blantyre with its big buildings, big crowds and big character, then onwards along the M1 through more police checkpoints than we care to count. Green becomes red, rolling becomes flat and then flat becomes spectacular mountain. After Ntcheu we’re not even sure which country we’re in, our maps suggesting that the highway we’re driving along is the border between nations, Mozambique on our left and Malawi on our right.  Dedza announces itself with a large welcome sign and yet another speed trap, smoke…