Hmm, nice sunny day on Friday so I thought I'd take the Spyder out for a blast. My start-up routine is to push the car out backwards before firing up the motor so I don't fill the garage with carbon monoxide

ainkiller:
I knew something was up when I couldn't budge it - assuming the handbrake had stuck on I decided to start it inside and reverse out to 'break' the shoes off the inside of the drums. As the car started to move, a tell-tale squelching and squealing sound alerted me to one very flat tyre on the front nearside wheel.
This set me a bit of a problem: even with all four tyres fully inflated the ground clearance is tight. In fact, to get my trolley jack under the front wishbones or cross-member I have to drive the car up onto wooden blocks first. The tyre was so flat that I couldn't drive it onto the blocks, and to compound the problem, all the garage electrics were out too so I couldn't fire up my compressor.
Attempting to pump up the tyre with a foot pump resulted in more air coming out of the tyre than was going in, so I gave up as I had this much clearance under the front of the car -
To give an idea of exactly how little clearance that is, here's my pocket rule against a standard sized number plate -
Today I was able to work out why I had no electrics in the garage - a roll of old carpet I was storing against the wall had slumped against the master switch and turned it off - and the compressor was able to get enough pressure into the tyre to drive it onto the blocks and get a jack underneath as it rapidly hissed its way flat again. I can't find anything obvious sticking out of the tyre but I'll get it checked out professionally in a day or so.
Which brings me to a bit of a thought provoking point: how would I deal with a flat tyre if I didn't have access to a compressor and my wooden blocks, or if the tyre wouldn't inflate at all?
Now, I have been carrying around a tyre seal aerosol for the last two years specifically for that eventuality, but when I actually needed it, it occurred to me that it's almost certainly been developed for use on tubeless tyres and I have inner tubes fitted. Anybody tried tyre sealant on a tube tyre?
It also set me thinking that you can't just drop into quickfit and have a new inner tube fitted if you get a puncture on a classic car, as tyre fitters just don't stock them any more.
So, the thought is slowly formulating in my head that I need an emergency kit in case I suffer a flat tyre on a longer journey. I'd rather not carry a spare wheel as it would swallow up all the luggage space in my 'boot' and in my experience they're almost always flat when you need them anyway.
Instead, I'll be carrying a couple of spare inner tubes and I'm thinking of buying an exhaust jack, similar to the ones Trumpton use to lift overturned trucks off flat pedestrians -
http://www.westfalia.net/shops/car_accessoires/tyres/changing_tyres/jacks/51616-autolift.htm?gclid=CNGwnd2wisQCFaTnwgodoHoAuA&art_nr=116194
Has anyone tried one of these (or similar)?
Hopefully, that should give me a fighting chance of the RAC getting me back on the road within half a day or so if I get a flat. That could mean the difference between getting to Goodwood Revival or facing the ignominious trip home with the Spyder on the back of a tow truck instead.
If nobody's tried an exhaust jack I'll get one ordered and report back when I've tried it. Looking at the exhaust gas collector cone it looks like I might need to fabricate an adaptor for my side exit pipe first though.
More later.