I get loads of errors when using NRE, including errors with codes "04" and "06" for no apparent reason, just when I load up such things as LDBs or perfectly routine Journey Planner queries. I've tried multiple devices with various browsers, various internet connections, cleared caches and so on, with no luck in getting some stuff to work reliably. As a result I basically no longer use the site unless there is absolutely no alternative whatsoever. With the advent of sites such as RTT, BRFares, Sussex Trains and so on, there often is!