No, it's defninitely not a lipoma. She's a lumpy dog in general, always has been. She has atopic dermatitis and malassezia pachydermitis, which is a greasy fungal skin problem with paws, ears and skin folds. She also gets lipomas, cysts and odd warty things, but this is clearly a proper tumour, with a really strong blood supply. 
I LOVE Musterlanders. There were two attending the canine studies course I did when we first moved to Lancashire - gorgeous dogs.
My boxer x gsd had fibrosarcoma of the hock. Vets misdiagnosed and screwed up the biopsy during the foot and mouth crisis. They said it was low grade and harmless, I disagreed and argued, they refused to agree it needed 5cm clean margins when it was removed. It came back within 8 months, as I predicted, because cutting a fibrosarcoma actually encourages it to grow. The first time it was removed was the week I found out I was expecting ds1, it grew back big enough to be visible to the eye when I was 8 months pregnant but had grown big enough to rupture by the week after he was born and he died when ds was 10 days old. They took him in for xrays to assess metastasis prior to leg amputation and found every single organ was riddled, so we had to make the decision that they shouldn't wake him from the anaesthetic.
Re chip shop. It was actually a gf chip shop until a few months ago. It was family run and they had a coeliac family member, so kept a fryer completely separate and had gf batter - twas great. Unfortunately they sold it on and now it's only gf on a Wednesday night when they change the oil.
Oh my goodness! Just read down your post. Poor dd2, I hope she's ok - and you for that matter. As you said, hopefully it will at least serve as a reminder that they need to be taking her needs more seriously. I'm surprised they aren't going to supervise meals more closely - surely it's a safe-guarding issue?
I've had another ridiculously hectic, odd day. Been worried about ds1 for a while now. He usually doesn't sleep well, takes hours to to get to sleep, then sleeps lightly for a few hours and is up at the crack of dawn disturbing the whole house. Since Christmas he's been really exhausted and lethargic and we've been putting it down to stress. Then last week he started to literally fall asleep as his head hit the pillow and sleep really deeply. Usually if I go in their room at night he will ping awake, but I have been able to go in, put washing away, tuck him in etc and not even a stir. He's also been unable to get up in the morning, even ds2 has been getting up before him. He looks ghostly with big black puffy rings under his eyes. Seems to have been getting worse by the day, but no other symptoms - except a he's told me a few times over the past couple of days that the world seemed to suddenly slip sideways, as if the ground suddenly tipped up and he seems to be having episodes of completely missing parts of conversations.
I have mentioned it to school a few times and his LSA has said he's been exhausted and struggling there as well, but she kept playing it down. Then this morning he simply couldn't walk to school. He insisted on going, but clearly wasn't up to it. We got outside and he said his lunchbox was too heavy to carry. I was limping slowly and he said he couldn't walk that fast. I said I wanted him to stay home, he tried to have a meltdown, but didn't have the energy. Managed to get to school (had to take ds2 anyway) and he really looked like he was going to collapse any second - still arguing all the while that he wanted to go.
I had to go to assembly this morning, as ds2 is star of the week, so I suggested he come to assembly with me and see how he went - no dice. So I took him to the office to ask to see his old teacher from last year and see if she could make him see sense. Got in there to find his LSA signing in. She agreed he looked awful, but again said "oh, it's just the start of term" etc. She did suggest he went home, again no dice. So I suggested to her that he come to assembly with me and between us he agreed.
He only lasted until ds2 had his certificate (about ten minutes in) and he clearly couldn't hold himself up in the chair, constantly yawning and positively transparent in the face. So at the first hymn, I tried to take him out - another attempted meltdown, but I managed to bundle him into the hallway. Lots of tears, but I pulled rank and he went to fetch his stuff. Got home and called the GP, who happened to have a cancellation in an hour's time. Took him in, GP took one look at him, listened to what's been going on and sent us straight to the hospital for bloods. He said he's not sure, it could be stress, but he wants to eliminate physical causes before making that call.
Ds broke down as soon as we left the GP's room because he didn't want the bloods done and he really hates the emla cream (sensory). He wailed and sobbed and carried on - no talking to him.
Then the chemist screwed up and lost his emla prescription, so he was left ranting away in the car with dd and grandma for almost an hour, while I stood up on my bad foot waiting for them to sort it out. 
Mum was grey by the time I finally came out - poor woman.
Raced home, threw some lunch down dd and raced her to nursery with seconds to spare. Then went home, stuck on the emla and went to the hospital, where first of all they kept us waiting for an hour - so the emla had worn off and then they informed me their new policy is not to do kids and they would try once then, if it didn't work, we'd have to go to the city paeds dept an hour away for a paed phlebotomist. 
Fortunately he gave blood generously and was surprised at how little it hurt.
Took him to the local garden centre cafe for a milkshake on the way home for being brave and he fell in love with a teddy, which Mum promptly bought for him and he is now curled up on the sofa cuddling it, along with his rather manky, one-eared, precious 'Bunny'.
What a day! Another day with no time to eat. Managed to grab a banana on the way to the hospital in lieu of breakfast and lunch and grabbed some maltloaf somewhere along the way. Now have 1,000 calories left for tea!