Scavenging for food at Heathrow Airport

The travelbug is in Austria this week, so I apologise for any spelling errors. I'm having to use a German keyboard, and the spell check is trying to correct me in German so everything is coming up in red!
Admittedly, Heathrow Airport is not on my top 50 list of favourite places on planet Earth. It is, however, a useful place to pass through if you need to get to an awkward destnation quickly. Which is how I found myself there on Saturday morning. The awkward destination being Innsbruck, where I was headed to visit family.
I thought this would be a good opportunity to see how difficult, or easy, it is to stick to a plant-based diet whilst in transit. I appreciate there are thousands of vegans out there who do this on a regular basis, and are probably telling me to shut up right now. But for me it was an interesting experience. It actually reminded me of when I first turned vegetarian, before the days of labelling foods for dietry requirements and before most people really understood what vegetarianism was. I remember many a trip where my staple diet would be fries, salad and bread, and I would constantly have to tell people that no, I don't eat fish, and I can't just pick the chicken out or eat around the beef.
So there I was in Heathrow airport, having to read every single ingredient again. I must point out here that, unfortunately, I was flying from Terminal 1. The larger terminals at Heathrow do have some excellent fresh food outlets, and I can't wait for them to make it onto the UK high street. I settled on a carrot, houmous and salad leaves on wholemeal sandwich from Boots, a fresh pear and filling my water bottle up from the water fountain. The sandwich is made by a company called fresh! (I believe the exclamation mark is an essential part of the name). The blurb on the box (which is recyclable by the way) promises 'no gunk and no junk', and I have to say it was a really tasty sandwich. The only downfall is that the houmous did contain tahini. On that note, does anyone know the correct spelling for houmous? I've come across a few different variations so far.
Extra brownie points go to Caffe Nero, where the lovely barista was more than happy to make me a latte with Alpro Soya, which I might add was one of the tastiest lattes I've ever had.
For the benefit of anyone else who is travelling through Frankfurt airport in the near future, they have a lovely fresh food outlet. The vegetarian options are still quite dairy-based, but there's a lot of fresh fruit and juices.