So unfortunately upon examination Poppet has at least 7 lumps, 3 either side which are likely lymph nodes, plus the one at the front which seems to be attached to the larynx and as I suspected is pushing on her airways causing the noise. This is likely cancerous and isn't something we would consider surgically removing.
While she is well in herself we will continue to monitor her, if the big one grows we can try to drain it if possible and if she starts getting snotty we can call for some antibiotics. I had thought one of her front feet was a little purple tinged and when he checked her mouth he asked if I had noticed a blue tinge on her guns as she wasn't as pink as she should be. So it looks like her little body is struggling.