I've just listened to Kate Elliott on the video of the link I put up the other day. She said the BL traveled at a 'similar' time as the phone, so it could still have been in another vehicle and by the timings we have, i.e. phone went off BSE mast at 4.19am while the BL was just getting to HS (4.20am) and if the BL left shortly after, it could almost coincide and therefore be a 'similar' time.
Then we have the phone staying on BM mast until about 8am and it didn't move after that. (info given by LE). Yet when news broke that LE were going to search the LF, MM and MSM claimed that the phone led to the LF, yet LE have never said that. If that was the case, surely LE would have said so as it would give them much more of a good reason for searching the LF.
Then the weight collected by the BL changed, but was it the right BL? There had been confusion before about which BL made the collection, so there is the possibility that it's got rather muddled up and they may still not have got the right BL.
All the above could be why they haven't found him at LF.
Last week? LE said they were looking more into his lifestyle. There are only two possible reasons for that IMO: 1. they think it may have something to do with foul play or accidental death, or 2. they think someone is shielding him.
Here's the link again if you want to watch the video:
http://www.cambridge-news.co.uk/news/local-news/search-corrie-mckeague-we-never-13027995