From the GNE site:

Following the completion of the repaints on the “Saltwell Park” branded Wright Streetlites, Wright Streetlite DF/Wright Streetlite Max Micro-Hybrid 5415 (NK15 EOF) has transferred from Riverside to Deptford. Similar 5416 (NK15 EOG) and 5417 (NK15 EOH) have both been formally allocated to Riverside (previously float/reserve), displacing Volvo B9TL/Wright Eclipse Gemini 2 6048 (NK12 GCZ) and 6084 (NL63 XBS) to Deptford. These three buses, as well as Volvo B7TL/Wright Eclipse Gemini 3943 (NK05 GZR) which transferred to Deptford last week, will provide cover whilst Deptford’s “Fab Fifty Six” branded Volvo B9TL/Wright Eclipse Gemini 2s undergo repaint and refurbishment. The examples taken out of service thus far include 6087 (NL63 YHP), 6088 (NL63 YHR), 6089 (NL63 YHS) and 6090 (NL63 YHT).


Wonder if this confirms, they'll stay on the 56.