If it was abandoned I wouldn't be paying about £2,000 per month to keep it going...
There is a substantial update coming, and a small group of around 30 people have access to it (although it's currently down) which brings a new branding to the site amongst the facility for further improvements. There's also a number of things in the pipeline that don't touch the GB mainline that should hit the public by the end of the year.
Over the last few months, starting in mid-March, I started a long 8 month programme to revamp the infrastructure that runs it. I've thrown in about £15,000 in capital for new servers, firewalls, switching. At the beginning of the year, I had two data centres (half cab in York, 3U in Gatwick for those that care) that are both being moved to cater for increased capacity and future projects. Those new data centres (full cab near London Bridge, and half cab in Manchester) are nearing completion and RTT will be brought live in the London data centre next week. That, amongst other paid work which contributes to the running cost and salaries (yes, it's a full time job), have taken most of my time recently.
https://bgp.he.net/AS209082 for an example of the work being done although I imagine only networking people will understand that!
As ever, we read everything via the feedback email address on the website even if we don't reply...
Not really true. Looked at doing this before. Setting something up like this initially is easy, then they start changing their fleets. 755s being a primary example. It's hard enough keeping up with signalling system changes.