7 Location, on the 28th of June 1914 of the assassination of Archduke Franz Ferdinand, the proximate cause of WW1 (8)
8 Town in Northern Spain where Franco set up the rebel Government in the Civil War (6)
10 Short-winged, black-and-white seabird of the family Alcidae (3)
11 Classic 1942 film starring Humphrey Bogart (10)
13 The Israeli unicameral parliament (7)
15 The point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected (6)
16 In weaving, the instrument used for shooting the thread of the woof between the threads of the warp (7)
17 Artistic style of the 17th century whose name is derived from the Portuguese for "misshapen pearl" (7)
20 Actor in A Midsummer Night's Dream who is given a donkey's head by Puck (6)
22 North London football club nickname "The Gunners" (7)
23 Member of a large genus of rod-like bacteria associated with food poisoning (10)
26 A machine that scans a document and transmits it through a telephone link (3)
28 Decisive battle in 216BC between Hannibal and the Romans (6)
29 Wilhelm Conrad ---, discoverer of X-rays (alt spell) (8)

1 Jewish festival of lights (8)
2 Amateur radio operator (3)
3 Brightest star in the constellation Lyra (4)
4 Mother of Oedipus (7)
5 Son of Adam and Eve (4)
6 Capital of Antipodean island (6)
9 Block of flats in the East End of London which collapsed in 1968 resulting in 5 deaths (5,5)
12 Athletic contest consisting of five different events (10)
14 Site of the witchcraft trials in 1692 (5)
15 TV police show with Stratford Johns (1,4)
18 Environment-friendly petrol (8)
19 Fortified wine or a rich sponge cake (7)
21 Fraudulent Gaelic poet (6)
24 With the Niesse, this river forms the boundary of Germany and Poland (4)
25 Sediment that forms during the fermentation of alcohol (4)
27 A 44 character set of letters sometimes used in the teaching of reading (3)