I recommend you look and find out what cabinet your new property is connected to.
If you are lucky it is a Huawei cabinet. Very very few lines on Huawei cabinets have interleaving.
If you have an ECI cabinet and the line is too noisy for Fastpath, the default interleaving adds 8ms latency.
You can check what cabinnet type it is by following this guide.
http://www.kitz.co.uk/adsl/cabinet-lookup.htm#fttc_c...
As John says, if low latency is important, then you want to try to make sure G.INP activates, and DLM doesn't interfere. That means
- having a Huawei cabinet. G.INP isn't active on ECI yet.
- choosing an ISP that makes use of the loosest DLM settings offered by Openreach (is this the 'Speed' setting?)
- once operational, monitoring the error rate on the line
- if error rate high, fixing environment or forcing a lower speed.
Once DLM is involved, it doesn't always disengage easily. Proactive monitoring from day 1 is important, although even Huawei connections start with a higher latency setup for the first 48 hours.
If speed is important, you should pay attention to the A and B ranges on the checker, and only use an ISP that guarantees the A range. If the line has problems, you are more likely to get an engineer callout and a higher chance of killing the contract.
But ... honestly ... if the day job is trading, and it requires perfection, then go with FTTPoD or a leased line. FTTC is like ADSL - getting speed cheaply in the presence of imperfection.
Your VM connection is shared. What would you do now if 4 neighbours became torrent freaks overnight, and overloaded the segment they shared with you? You'd move, right? Consider yourself lucky that a cheap-as-chips connection meets your higher business needs, but don't assume that to be, or remain, universally true.