Hi, Our 10wo wriggles in her sleep so she is diagonal in the bassinet pushing against the side of the bassinet. Is this safe? Should we move her back to middle of bassinet if we wake up and she is like this ? She’s in a LTD sleeping bag with a thin blanket up to her bellybutton.

Many babies will wriggle & change position (like you describe) at a fairly young age.
Some babies just do not respond well to wrapping & like their arms free.
Often this can mean that baby is soon going to be rolling.
Most babies will be rolling over by 4-6 months…....some earlier, some later.
This is very normal as babies grow & become stronger many babies then prefer to sleep on their tummy.
It is important that you move your daughter from bassinet to her cot & cease wrapping - or using wrapping products as you describe, in preparation for rolling.
Baby needs arms free.

Red Nose also recommends modifying any wrap at 3 months to allow for arms to be free, in preparation for rolling
Modify the wrap to meet the baby’s developmental changes, e.g. arms free once ‘startle’ reflex begins to disappear which is usually around 3 months
https://rednose.org.au/article/wrapping-babies

This is not something that needs to be stopped, but it is important to make the environment as safe as possible for this to occur.
Continue to place baby on their back to sleep.
Ensure cot mattress is firm, well-fitting & flat.
Ensure there is nothing loose or soft in the cot.
Preferable to use a sleeping bag now that has appropriate size neck & arm holes.

Red Nose has the following information when baby is rolling.
Give baby extra tummy time to play when awake and supervised as this helps baby to develop stronger neck and upper body muscles which in turn enables them to roll back over.
Make sure that baby is on a firm and well-fitting mattress that is flat (not tilted or elevated).
Make sure that baby’s face and head remains uncovered (do not use lambswool, doonas, pillows, cot bumpers or soft toys)

As babies grow and develop they become very active and learn to roll around the cot.
At this time, continue to put them on the back at the start of sleep time, but let them find their own position of comfort.
By this stage it is not necessary to wake during the night to turn baby over to the back position

Do not use any devices designed to keep baby in a particular sleep position.
https://rednose.com.au/article/what-do-we-do-now-that-a-baby-has-started-to-roll-over