Kathryn Thomas and Dave Fanning to fill in for Ray D'Arcy and John Murray as Derek Mooney gets new show
The knock-on effect of either broadcaster vacating their slots on Radio 1 and 2Fm respectively would see major schedule changes.
Also, with many presenters taking annual leave throughout July and August the schedules are continually fluctuating although RTE has just nailed down the final schedule for the next two months.
Brendan O'Connor is currently filling the slot vacated by John Murray at Radio 1 but Dave Fanning will take over the helm for the month of August.
Kathryn Thomas, who recently filled in for Ray D'Arcy in his 3pm slot on Radio 1, will again cover for D'Arcy for the last two weeks in August.
Derek Mooney, who previously vacated the slot currently inhabited by Ray D'Arcy, will return with a light entertainment show on Saturdays on RTE Radio 1 at 6pm from August.
In the meantime, Mooney Goes Wild will replace Miriam O'Callaghan at 10am from this Sunday.
Over on 2FM, Stephen Byrne is filling in for Ryan Tubridy for the next two weeks and in August the usual summer arrangement applies - Breakfast Republic will broadcast until 10am at which point The Nicky Byrne Show, co-presented by Jenny Greene, will take over.
RTE will soon announce the replacement for John Murray, whose 9am show was axed last month after five years.
Tubridy and D'Arcy are both rumoured to be in the running to replace him with Nicky Byrne tipped to replace Tubs should he vacate his slot at 2FM.