To 2131: present

Redundant words were: IRAQI (1A), ADO (5A), AENEAS (39A), EPEE (5D), AREA (25D). In line with 16/17, remaining unclued lights were all anagrams of snakes: 18A ASP; 26A COBRA; 36A BOA; 41A FER-DE-LANCE; 31D ELAPID; 33D TAIPAN; 35D ADDER.
 
First prize Rowan Priestman, Guildford, Surrey
Runners-up Margaret Lusk, Fulwood, Lancashire; P. West, Birmingham