6 Across, Ruin chances of quick return after moving to other bank (4,4,7)
9 Across, Crucial location reached,as result of excellent service (5,2,2,6)
10 Across, Don't give up SE route with yachts at sea? (4,3,6)
19 / 25 Across,Continue to final destination,going by air(4,5,2,2,3,3,2,3,4)
Just done the crossword and found that 6a is burn YOUR bridges - I had assumed that the Times convention of using ONE'S (instead of YOUR) would be used.