Where: 
Mostly online - current favourites are Fabworks and Fabric Guild, but I'll go anywhere!  In the past I've used Minerva a lot, but I'm getting rather frustrated with them.  Their customer service is not the best, which is fine when everything goes smoothly, but not when something goes wrong. 

Offline I got to Doughty's fairly regularly even though it's about 85 miles away, because my parents are in the area.  Calico Kate is 15 miles away and is just lovely - staff and fabric - and it's such a great place to wander around.  Aberdashery is closer to home and is now very good again (it closed down but opened up with a new owner shortly afterwards).  I also find myself on the Wirral several times a year and go to Abakhan (Birkenhead and sometimes Chester) and Calico Laine.

How: 
Online I tend to be looking for something specific, but obviously I have to make sure that the order is worthwhile  , and I also do a lot of browsing just in case I miss something...  Like @wrenkins I have full baskets in a number of shops.  Don't you just hate the shops that empty your basket after a few hours of inactivity?!?

Offline I browse looking for ideas - I don't find myself in fabric shops often enough to risk missing anything wonderful, and, of course, offline stock is not always available online.  Abakhan remnants are a wonderful lucky dip.  I have had (mostly) wonderful bargains, but also the odd absolute turkey!

Why:
Because it's fabric!  To ensure I am well supplied come the zombie apocalypse when there is no internet and all the offline shops have closed!

Seriously though, because I can't just nip out to a fabric shop I do like to have plenty to spur me on and inspire me.  It's good to know that if I decide that I need a certain item of clothing I will be able to just go ahead and make it.  If I have to order the fabric I am likely to have gone off the boil before it arrives.

Mr Acorn is a collector of many things, and understands the idea of buying fabric because it's lovely - he's a real enabler - which is good for my stash but not my wallet.  I am not a collector of 'things', but I am a collector of projects.  There are sooo many quilts in my head which will probably never turn into the real thing, but hopefully some will!

That's going to be amazing!   

Have you thought about Exmouth?  We lived there for several very happy years about 20 years ago.

So emailing it to myself doesn't work. Off to try drop boxing it to somewhere else on the Mac.

Apparently that works, so.....?

Have you tried uploading a picture from the other place on your Mac? 

Thanks @Ohsewsimple - please do PM me!

If it's coming direct from the manufacturer there will be a delay, as the manufacturers don't  currently have any!!

Can anyone give me any feedback on any of the following sewing machine suppliers?

Hampshire Sewing Machines
Six Penny Memories
Sewing Quarter

These are the only places I can find that appear to have the Britannia coverstitch in stock - whether they turn out to really have one is another matter of course - and I can't find any reviews for them as suppliers.

Franklins, who would be my preferred supplier (since they are also the manufacturer!) won't have any in stock until a tentative late July, and I'm not patient.