Original sentence: My recollection may well be totally false and faulty - but my recollection - is that there was a short email from the PMO [Prime Minister's Office] to me which very simply alerted me to the case of John Grant
Edited sentence: My recollection may well be totally false and faulty - but my recollection, big qualification - is that there was a short email from the PMO [Prime Minister's Office] to me which very simply alerted me to the case of John Grant