New signing Sam Toluwase led the home team’s scoring with 17 points and forward Richard Bell, easing himslef back after knee surgery, contributed 10 points in just over 13 minutes of action.
Their performances pleased head coach Yorick Williams, who said his side must cut out errors to land that all-important first victory.
London led 20-14 after a quarter and 40-33 at half-time. But, despite getting within three points of their rivals, a poor third quarter derailed the Giants’ chase.
Just nine points in the period saw them slip further behind at 64-42 going into the final quarter.
Jerelle Okoro hit 11 points for the Giants while Rashad Hassan had 22 points and 10 rebounds as the visitors stand-out.
The Giants face Worcester next Sunday and there will be a Halloween theme. Anyone turning up in fancy dress can get discounted entry when paying at the door – £5 for adults and £3 for children.