Despite the slippage to new daily lows for GBP/USD spot in recent trade, FX volumes are less impressive, with no material uptick in participation through the dollar rally. GBP futures volumes remain below average for this time of day (consistent across G10).
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Press release (link) highlights point to a similar story to that from the flash at first glance:

Global core FI futures have moved away from session lows over the past hour, with aforementioned block purchases in 10Y USTs helping the space stabilise. A ~1.5% pullback in crude oil futures may also be lending support.
DUV5 107.20/107.10/106.90p ladder, sold at 3 in 4k.