Thank you all very much for your responses. I am very appreciative!
I have one of those ceramic heaters that is on all the time, and have today got a basking lamp as the weather has become cold.
I have just realised though that the enclosure sold to be has a mesh top, so I will cover that with a towel to prevent heat loss while weather is a little cooler.
So far, the coldest I have seen the temp in the enclosure is 21 deg overnight. That's with basking lamp off.
The enclosure was checked out by the breeder who said it was fine.
Hoping its just the relocation adjustment.
I'll keep trying to offer the food each day. How long without food until it becomes a worry?
I'd set the towel aside , call Bunnings Trade Desk and ask for a sheet of 12mm thick plywood to be cut to match the foot print of your enclosure and simply place that on top of the enclosure, less likely to catch fire than a bit of cloth.
The plywood will help keep the heat in, and will help you create a good thermal gradient.
Turn off the CHE for now , unless it gets quite cold overnight in your room (under 15oC) in which case you could turn on the CHE to keep the enclosure warm overnight.... some keepers don't heat their beardie enclosures overnight, but it can't hurt and will help them metabolise their food from the previous day. The CHE needs to be on switching thermostat to ensure you maintain a suitable temperature overnight.
If your not getting under 21oC, you wont need overnight heating.
I use 7W heat matts for my beardies and BT skinks (on simple switching elcheapo ebay thermostats) to provide a warm refuge for the spoilt pet lizards for overnight, mine all love their cozy warm hides (which happen to double s basking spots during the day and warm beds at night).
The best way of heating a beardie enclosure during the day is via a good quality (as opposed to cheap nasty no brand/shop brand) MVB (will give bright white light, heat, UVB and UVA) , or a Philips par38 clear colourless spotty (heat and bright white light).