Complex sentence: At about the same time the TRE had taken delivery of an SCR-720 unit from the US, this was a re-packaged and lightened version of the SCR-520, suitable for use in the Beaufighter and Mosquito.
Split into simpler sentences: At about the same time the TRE had taken delivery of an SCR-720 unit from the US. This was a re-packaged and lightened version of the SCR-520, suitable for use in the Beaufighter and Mosquito.