England's Andrew Smith beat Pablo Abian in the men's singles first round at the World Badminton Championships.
Smith is England's highest-ranked man in the singles
The 16th seed beat the Spaniard 21-15 21-13 at the Madrid event while his team-mate Tracey Hallam also won.
The Commonwealth champion and 11th seed thrashed Spain's Lucia Tavera 21-6 21-4 but Harriet Johnson of Wales was beaten 21-12 21-17 by Bulgarian Linda Zechiri.
In the mixed doubles, 13th seeds Robert Blair and Natalie Munt of England beat Japanese opposition to reach round two.
Their team-mates Kristian Roebuck and Jenny Wallwork also won but Keith Turnbull and Emma Mason of Scotland were beaten by South Korea's Lee Yong-dae and Hwang Yu-mi.
Britain's Olympic silver medallists and fourth seeds Nathan Robertson and Gail Emms have a bye in the first round as do their English compatriots England's Donna Kellogg and Anthony Clark, who are seeded nine.
There was better fortune for Roebuck in the men's doubles as he and Ian Palethorpe upset 11th seeds Michal Logosz and Robert Mateusiak 21-16 11-21 21-12.
Scots David Forbes and Stewart Kerr also went through after beating Andrei Konakh and Alexandr Russkikh.
In the women's doubles, Munt and Joanne Nicholas qualified for the second round but Imogen Bankier and Emma Mason went out.
The Scottish pair were beaten 21-16 21-18 by Sock Ai Ooi and Hing Yau Mooi of Malaysia.
There were also defeat in the men's singles for Martyn Lewis of Wales, who lost 21-14 21-13 to Przemyslaw Wacha of Poland.
Indonesia's Taufik Hidayat starts the defence of his men's title with the threat of a long ban hanging over him.
He stormed off court after a disputed line call in the recent Hong Kong Open.
The Olympic champion was upset about a changed call in the quarter-final against great rival Lin Dan last month.
He left the court after just three minutes and surrendered the contest to the Chinese player, who went on to win the title.
The International Badminton Federation was due to consider the case when delegates meet in Spain on Monday, but he will have to wait until Saturday to discover his fate.