UnScramble this Word: i b l g n i k b?

Questions

Which member of Margaret Thatcher's Cabinet was once an airline pilot?

What occupation did David Jason, Lech Walesa and Ricky Tomlinson all once have in common?

The followers of John Wycliffe were given what nickname by their enemies?

Which word is the Latin for 'pebble' and is now, applied to a branch of mathematics?

In which sport does the term 'to win hands down' originate?