On arrival in the Mediterranean, Brennan was posted to No. 249 Squadron RAF.
RAF Bomber Command | The Sabre Squadron | RAF Sculthorpe | RAF Northolt | RAF Coastal Command | No. 33 Squadron RAF | No. 263 Squadron RAF | RAF Ringway | RAF Lakenheath | RAF Brize Norton | squadron | RAF Leuchars | Pacific Squadron | RAF Mount Pleasant | RAF Mildenhall | RAF Greenham Common | RAF Fighter Command | No. 45 Squadron RAF | No. 127 Squadron RAF | RAF Wyton | RAF Welford | RAF Valley | RAF Tangmere | RAF Search and Rescue Force | RAF Molesworth | RAF Lossiemouth | RAF Leeming | RAF Honington | RAF Coningsby | RAF Alconbury |