I must admit that the registration sounded familiar but I looked for it in my log book after the first query and didn't find it. It seems that it disappeared from the Sqn soon after I had arrived at Lossie. Sorry for any confusion whether she is an AEW or not - the following is cribbed from the interweb:
WL795 MR 2/AEW.2
- First flown 17.8.53 and A/Cn 31.8.53. Delivered to 23MU 8.9.53 for storage. Sent to the CAPMF St Mawgan 30.10.53 for mods before issue to 204 Sqn 6.1.54. Uncoded. Received Cat.3 damage in ground accident 13.3.54. Repair not completed until 13.9.54, when returned to 204 Sqn. Autolycus 'special fitment' at 49MU Colerne 28.2.55, completed by CCMC St Mawgan 22.3.55, when WL795 was ferried back to Ballykelly. Transferred to 269 Sqn11.11.58 and to 210 Sqn on formation 1.12.58. Remained uncoded, and back with 204 Sqn 23.11.59 until allocated to Avro 15.12.59 for Phase I/II update, completed 6.12.60. To 38 Sqn 20.12.60 and coded T. Allotted to HSA Langar for Phase II1 modernization 21.6.66, completed 13.7.67. Issued to 205 Sqn 1.8.67 and coded G. To 5MU Kemble 2.2.71 for storage and overhaul, prior to despatch to HSA Bitteswell 4.2.72 for AEW.2 conversion, first flying as such 8.72. To 5MU 5.9.72 for painting and allotted to 8 Sqn 12.10.72. Delivered to Lossiemouth 18.10.72 for radar installation and acceptance before joining 8 Sqn at Kinloss. Named 'Rosalie'. Transferred with unit from Kinloss to Lossiemouth 14.8.73. Withdrawn 1981 and allocated for crash rescue/fire practice at St Mawgan. Flown from Lossiemouth to St Mawgan 24.11.81 and allocated maintenance serial 8753M. Not used for fire fighting, remaining in open storage until 1988, when prepared for display on the station. Reassembled in MR configuration during 3.89 - 4.89 and coded T for display purposes. Currently in care of Cornwall Aviation SocietySt Mawgan, Cornwall.