oddly enough the so called "no Bleed" system would mean that you can't run close enough to the surge line to be efficient and when the VFSG comes on load the engine would be prone to surge especially if accelerating N2 or N3.
so of course to counter this and allow operation a bit closer to the surge line, the Trent 1000 "no Bleed" engine has 5 bleed valves, 3 at IP8 and 2 at HP3.
these bleed valves are scheduled by N2, N3 rpm, T24 IP inlet Temp, and VFSG load, and dump into the by-pass duct rather than the cabin.