With Pride, For Our Trees Of Today & Tomorrow. Backed by nearly 40 years of experience, Limbwalker Tree Service provides tree care, stump removal and grinding, and trimming services to London and surrounding areas. Our family-owned and operated company is led by long-time arborist and chainsaw instructor, Ernie Roberts. Ernie is well known in the region for his arboriculture work, as well as friendly, dedicated , personal service.