If you are planning on travelling distance to attractions, we would recommend that you contact the venues directly in advance to avoid disappointment.
If you, or any of your party have a new persistant cough, or develop a fever of 38C, we would instead advise you to use the NHS's dedicated website for professional advice.
The Canal Centre and the offices in the same buiding were originally stables and a pub. On the other side, the lock cottage was replaced in the early 1970s, but the other buildings date from 1838, when they were built by Pickfords, then a major canal carrier - from the 1880s they were used by Fellows Morton & Clayton. The road bridge dates from 1973, and incorporates the old turnpike road to London: building it required the old canal shop, which was at the top of the ramp, to be removed.
You can walk up the towpath, or round to Ebury Way, the old LNWR branch line from Watford. Boat trips on demand except when canal is icy.