Last night we saw our intrepid contestants of the Great British Sewing Bee turning a mix of garments into a bomber jacket and the final challenge, turning sweater knits into a winter dress (which seams incongruous whilst we are having such sunny weather, but of course, this was filmed last year!).   Re-purposing old, previously loved garments or upcycling charity shop finds is a passion of mine and so I will share some of my tips for success.   If you are going to mix woven fabrics with stretchy fabrics, consider putting some stabliser on the stretchy fabric – a strip of washaway or tearaway along the seam will work well.   Cut all the garments into big pieces – don’t forget you can use…