Air space – ash cloud passes most of Ireland by

Why are the Irish authorities opening their airspace while the British are keeping theirs closed? Not that it seems to make much difference The answer seems to lie in this map

09.51 The Irish Aviation Authority (IAA) has announced that as a result of the ash cloud continuing to move away from the southeast of Ireland, it is lifting restrictions within Irish airspace except for a block off the south coast of Ireland

Air traffic control body Nats extended its restrictions on UK airspace until at least 0100BST on Saturday.

Former BBC journalist and manager in Belfast, Manchester and London, Editor Spolight; Political Editor BBC NI; Current Affairs Commissioning editor BBC Radio 4; Editor Political and Parliamentary Programmes, BBC Westminster; former London Editor Belfast Telegraph. Hon Senior Research Fellow, The Constitution Unit, Univ Coll. London