He took over from Ken Bruce in the mid-morning slot in May.
The legendary broadcaster left Radio 2 earlier this year after more than three decades at the station.
It’s not the first time that Greg has been caught up in a weird and wonderful challenge.
"Replacing PopMaster feels like when your parents divorce, and your mam brings home a new fella."
The 55-year-old DJ died suddenly while presenting the GenX Radio Suffolk breakfast show on Monday.
The DJ admitted he is also "a little bit in denial" about leaving the station after 24 years.
The BBC previously denied evidence of any complaints.
The presenter is standing in for Ken Bruce on his weekday morning show.
The 26-year-old south Londoner is radio's rising star – and she's not finished yet.