South London Storm won Saturday's all-London clash in the Powergen Challenge Cup first round, claiming a hard-earned 24-20 win over West London. Sharlston Rovers, who upset Dewsbury last year, kept up their giant-killing reputation with a 22-16 win at National League Three club Warrington Wizzards.
Teams from National League One and Two plus representatives from France and Russia enter at the third-round stage.
Super League teams play their first matches in April's fourth round.
Powergen Challenge Cup first-round results:
Wigan St Patrick's 58-6 Hensingham
West Bowling 12-10 Leigh East
Oldham St Annes 52-10 Loughborough University
Wigan St Judes 68-0 Embassy
Royal Navy 16-18 Normanton
Stanningley 40-16 Walney Central
Halton Sims Cross 23-14 Widnes St Maries
Blackbrook 6-9 Oulton Raiders
Castleford Panthers 10-20 East Hull
Haydock 46-12 Cutsyke
Hull Dockers 48-16 Bradford Dudley Hill
Illingworth 20-18 Stanley Rangers
Gateshead Storm 10-66 Wath Brow Hornets
West Hull 8-38 Army
Westgate Redboubt 6-26 Eccles and Salford Juniors
Essex Eels 12-44 Elland
Barrow Island 16-12 Skirlaugh
Siddal 26-4 Coventry
Clayton 20-42 Leigh Miners Rangers
Waterhead 36-24 Askam
Queens 22-24 Millom
South London Storm 24-20 West London Sharks
Milford 42-20 Huddersfield Underbank
Bramley 10-31 Thornhill
St Albans 14-48 Thatto Heath
Royal Air Force 8-44 Castleford Lock Lane
Warrington Wizzards 16-22 Sharlston
Rochdale Mayfield bye
Second round draw takes place on Wednesday 9 February.