BHA investigations under way
Investigations into the deaths of Synchronised and According To Pete in the Grand National are "reasonably advanced" according to the BHA.
The safety of the four-and-a-half-mile contest is once being again being seriously questioned by welfare groups after Cheltenham Gold Cup hero Synchronised fell jumping Becher's Brook on the first circuit and then negotiated several more fences before suffering a broken leg.
According To Pete was brought down at Becher's second time round and also had to be euthanised.
This year's National was the first to be run since an extensive safety review into various elements, leading to a number of changes to fences and race conditions.
The RSCPA have urged further review, particularly into 'drop' fences such as Becher's.
BHA chief executive Paul Bittar said in a statement: "We extend our deepest sympathies to the connections of Synchronised and According To Pete who we know are devastated at the loss of two home-bred horses which meant so much to them.
"In November last year, the BHA published the findings from a comprehensive and detailed review of all elements of the Grand National.
"At this stage, we believe it would be premature to suggest that modifications to the course and other changes have not been effective or will not yet prove to be effective.
"Since the Review and the implementation of changes, four races have been held over the course without incident prior to yesterday's running of the Grand National.
"We are reasonably advanced in the process of examining the incidents which led to Synchronised and According To Pete being put down.
"While that process still needs to be completed, it is relevant to point out that although both horses lost their riders jumping Becher's Brook, Synchronised galloped away from the fence seemingly without injury and then subsequently incurred a fracture to a hind leg when jumping riderless, while According To Pete was brought down by another horse on the second circuit.
"We will be collating all the relevant information and data from this year's Grand National meeting so that it can be reviewed in conjunction with the statistics and findings of the Review.
"Initiatives such as speed sensing on the runners in races over the Grand National course will enable BHA and Aintree to make informed decisions based on factual evidence in our efforts to minimise risk where possible.
"The evidence indicates that the changes and improvements in safety made over the years have led to an overall decrease in injury and fatalities, both on the Grand National course and racing in general.
"It is important these matters be judged over a period of time. The decade since 2000 was the safest on record for the Grand National with a fatality rate of 1.5% compared to 3.3% at the start of the 1990s.
"Sadly, there have been two fatalities in each of the last two runnings of the race. Naturally our objective is for there to be no fatalities, but we also recognise that we cannot remove risk altogether from such a competitive activity.
"The Grand National is a unique race and it represents a unique challenge for the sport and for its regulation.
"It is a thrilling spectacle, but there is a higher degree of risk involved in the Grand National than other races and for this reason everyone in the sport needs to be conscious of how the race is presented to the public, the general consumer perception and their views of how the race is run.
"This is an event that generates huge public interest and has a global audience of more than half a billion people. We've seen record crowds of over 150,000 in attendance at Aintree this week, following on from record numbers through the gates to British Racecourses in 2011. All of this suggests that British racing is doing many things right in the eyes of the consumer.
"It is critically important to us that the good work being done in racing is not overshadowed by yesterday's events, and that racing continues to work collectively to develop and maintain this progress.
"In this context, we will be working with Aintree and its owners The Jockey Club, along with other groups in the sport to find the right balance which enables us to maintain the highest standards of safety for our horses and participants and to promote the sport to the widest possible audience."