More popular than surfing - good point. I've certainly seen golf clubs carried on trains.
A golf bag according to Google is typically about 1.3m high. Not ridiculous in the scheme of things though it is over the 1m.
Edit: I've just read what the National Rail site says, and it's not quite what I thought it was. It says this:
Items larger than 1 metre in any dimension that you cannot carry without assistance. This includes canoes, hang-gliders, large furniture and large musical instruments
(
https://www.nationalrail.co.uk/on-the-train/luggage/)
Clearly a skier will be able to carry skis without assistance, as they're going to have a job getting to the top of the run otherwise. Thus according to this they are not banned. Same with golf bags.
Surfboards, by contrast, are explicitly banned (even those very small ones that are under 1m long, technically, unless you'd say a bodyboard wasn't a surfboard rather than being a subclass of surfboard).
Though there's then:
Any animal or article which may cause inconvenience to passengers due to its size or behaviour.
...which is a bit open to interpretation - are some guards perhaps thinking a pair of skis may do that if the carrier is a bit negligent and belts someone round the head with them?
The
NRCoT actually says something completely different, and places skis and golf bags at the discretion of the TOC...
23. Taking Luggage and Other Articles with You on Your Journey
23.1 You may take up to three items of luggage into the passenger accommodation of a
train unless:
23.1.1 your luggage is such that it may cause injury, inconvenience or a nuisance
or it may cause damage to property;
23.1.2 there is not enough room for it;
23.1.3 your luggage would obstruct doorways, gangways or corridors;
23.1.4 the loading or unloading may cause delay to trains;
23.1.5 your luggage is not carried or packaged in a suitable manner;
23.1.6 your luggage is one of the prohibited items shown in the list shown in
23.4 below;
23.1.7 a Train Company has set out any special conditions relating to the carrying
of luggage on their own train services. In such cases these conditions will
be made available when buying your Ticket in advance and will be shown
on the Train Company’s website.
23.2 You will normally need to be able to manage your luggage without additional help;
however, if you have a disability and require assistance, you can book this in advance
of your journey. Please see Condition 21 for more information.
23.3 Articles may be conveyed in separate luggage accommodation, where this is
available, on the train service. Articles conveyed in such accommodation must for
security reasons be clearly labelled with your name, address and destination
station. Train company staff may not release items stored in separate luggage
accommodation to you until you have proved ownership.
23.4 Conditions relating to the carriage of specific items:
ITEM CONDITIONS
Pushchairs/Carrycots. Must be capable of folding
Wheelchairs and powered
wheelchairs.
Wheelchairs must be folded unless in use
and located in a section designated for
wheelchairs where provided.
They are conveyed subject to a
maximum width of 70cm and length of
120cm.
23.5 Items only permitted at the discretion of individual Train Companies:
ITEM
Mobility Scooters.
e-Scooters
Canoes; surfboards; sailboards.
Skis and ski-boards; golf equipment; other sports equipment except where shown
as not permitted below.
Musical Instruments exceeding these dimensions, 30 x 70 x 90 cm
Unloaded firearms, properly licensed, with prior permission of the Train Company
and carried in accordance with the law and any other specific instructions
23.6 Items that are not permitted to be carried on passenger trains:
ITEM
Motorcycles; mopeds; motor scooters
Furniture exceeding these dimensions, 30 x 70 x 90 cm
Firearms (except as shown above)
Dangerous goods; inflammable liquids; explosives
Interestingly this doesn't mention a size for anything other than wheelchairs, musical instruments and furniture, and those specifically are limited to 30 x 70 x 90cm and not one metre!
What an utter mess.