Picked this up last weekend: thoroughly good read. Only downside is that the journal itself is now £9.95 an issue! Towcester is the main article: 26 pages worth, by Bill Kendall and Chris Turner.
This is not available via the news trade, so you will need to find a railway oriented bookshop, such as the Titfield Thunderbolt (although the owner is a friend, usual disclaimers apply):
Enjoy the read!