Umana Yana is a precious Guyanese restaurant in Southeast London, run by Debbie Monfries and her spouse Junior. For a decade-plus, they've been making fresh, authentic Caribbean food that's up there with the very best in all of London. But the last 12 years have actually been a battle after massive telecom boxes were built right outside, damaging trade. Thankfully, the community has actually rallied behind this independent company in its battle with the council, including one…