Some background information:
The problem is that many Herts and N. London schools took on Moray House Verbal Reasoning Papers in lieu of NFER.
These papers were written between 1985 and 1997 (to the best of my knowledge) by University of Edinburgh. However in 1997 NFER came along and Moray lost their market place.
Another publishing house bought the rights to these papers and have for years sold these to the public and many tutors stock-piled these.
In the last two years, with kids preparing really well for NFER papers, Herts have looked for alternatives and sourced these papers.
Although as a consequence these papers were withdrawn from the shops they are still available in overseas websites; furthermore schools and tutor groups can also buy them at will direct from the publishers. Hence the above problems.
Last year Watford Grammar (and the consortium) had many parents complaining however it did not stop them using similar papers again this year.
So the kids who were tutored in Herts (ie the bigger centres who ordered the Moray House papers) shone whereas the rest were disadvantaged again this year.
You may be interested in the following discussion in the Warks section concerning Moray House.