Trouble getting varnish to forwards on to SSL on port 443

[doug livesey]

Hi -- I've recently setup a varnish instance to serve an image server, but
am struggling with how to get it to pass on SSL requests.
I've followed the instructions on the site as best I can, but there's still
not even a mention on varnishlog when I try to access an asset using HTTPS.
Normal HTTP works just fine.
I run varnish using the normal service commands (it's on Ubuntu), and my
configuration is as follows:
default.vcl: https://gist.github.com/3447615
/etc/default/varnish: https://gist.github.com/3447644

When I look for varnish processes on the box, I get this:
nobody    2665  0.7 13.4 1453740 1029096 ?     Sl   07:58   0:19
/usr/sbin/varnishd -P /var/run/varnishd.pid -a :80,:443 -T localhost:6082
-f /etc/varnish/default.vcl -S /etc/varnish/secret -s malloc,10G
root     30943  0.0  0.0 117204   868 ?        Ss   Aug22   0:03
/usr/sbin/varnishd -P /var/run/varnishd.pid -a :80,:443 -T localhost:6082
-f /etc/varnish/default.vcl -S /etc/varnish/secret -s malloc,10G

Could anybody please advise me as to where I'm going wrong, here?
Any & all advice very gratefully received,
   Doug.
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