I was reading Geoff Lindsey's blog and stumbled across an interesting matter. He says FLEECE vowel is actually a diphthong. Perhaps ij or ɪj. I can hear the diphthong [ɪj] in -ly, for example, and in words like "me" and "see" at the end of sentences, in British accents. Also, in Australian accent it seems to be [ej]. But I can't here a diphthong in words like "believe" and "peace". Does it vary depending on the situation? Or does it have to do with the speed of the speech? In Australian accent I can hear it in any cases.