I find White Marseilles is sweeter, more delicious and softer than Brown Turkey and does well outdoors.
It's generally regarded as the next best (after Brown Turkey) for outdoor conditions in the mid to south UK and indoors further north.
That still means it will produce slightly less in the same conditions - so make a bit more effort on placing it for a good crop.
It's not hard to find since - as I said - it's the next most recommended.
Reads of Norfolk have one of the widest ranges in the UK:
http://www.readsnursery.co.uk/acatalog/Green-or-White-Figs.htmlIncidentally Brunswick is also recommended by many but experts say it is big and sweet but lacks real flavour.
Panachee is striped and pretty but it's a greenhouse variety anyway.