Manchester United forward Ella Toone took the match ball home on this occasion and Mead added another to her international goalscoring tally, with Ellen White, Leah Williamson, Georgia Stanway and Rachel Daly also on the scoresheet.
The Lionesses even missed a 38th-minute penalty when White’s effort was saved by Enija-Anna Vaivode after the Latvia goalkeeper had tripped Lauren Hemp.
White also saw a looping header hit the woodwork before she was one of four players replaced at half-time.
Toone started the avalanche in the eighth minute, shooting home unopposed after Latvia had failed to clear a free kick, and she slotted her second after good work by Mead and Fran Kirby.
White lashed in the third after being set up by Toone, and Bright finished from close range at the far post just before half-time.
Mead produced a classy finish from Stanway’s pass in the 55th minute to make it 5-0 and Toone completed her hat-trick when drilling in a brilliant near-post effort.
Daly, Williamson and Stanway added three more goals in the space of as many minutes as the Lionesses continued to run riot against poor opposition.
Daly completed the scoring by notching her second following Mead’s excellent pass with eight minutes remaining.
The Lionesses have now scored 32 goals in four World Cup qualifying matches under head coach Sarina Wiegman.
Wiegman’s first three games in charge, all World Cup qualifiers, ended in 8-0, 10-0 and 4-0 wins against North Macedonia, Luxembourg and Northern Ireland respectively.
Additional reporting from PA