Cycling the forks through their travel (with the spring caps removed and springs out) while the axle is clamped and the pinch bolts on the legs loosened should align the tubes. Just be careful when contracting the fork lowers all the way that the fluid don't come out the top of the tubes.
One problem with Triumph forks in general is that there isn't any provision for draining fork oil without inverting the forks. Obviously a manufacturing step saved and lower cost even though Triumph buys the fork assemblies from another manufacturer (I believe Showa).
On my T100, I disassembled the lowers and drilled the legs from the bottom up, tapped the holes and installed drain plugs. That way, I can change the oil regularly as well as control the dampening by changing viscosity of the fork oil.
Forks without gaitors tend to have a bit of ingress of moisture over time that will compromise fork oil.