Why do you have to own a mobile phone to join CC?

Another one here who can't rely on a mobile signal or good broadband strength either. A lot of rural communities around the UK have the mobile signal dropping out regularly. It would be lunacy to lose the landline. The 21st century joys of good signals & broadband is still to catch up to some of us JC

Our landline is only ever used by cold callers & my Mum 

Even David Cameron couldn't get a mobile signal at his holiday house in Cornwall, so what chance have I got here at home?  I could walk 200 metres up the hill and stand by the farm cattle grid, but really... on a night like this? 

As every caravanner knows, there are significant patches of the countryside and rural areas where mobile reception is poor. North Norfolk is an irritating example. But you can't ignore a capability, which is enjoyed by the vast majority of the population on the basis that it doesn't work for you personally. We moved house two years ago, and rejected otherwise potential purchases, on the grounds of poor internet access. The OP seems unhappy that mobile phone numbers are a default expectation of Caravan Club members - they aren't mandatory though, are they? I guess the Caravan Club would be regarded as backward if they ignored a facility actively used by the majority of the population. And coverage is growing.

It appears from the OP that it is mandatory for CC purposes.

I can't imagine turning down the chance to buy an otherwise ideal property due to poor internet availability. Still, I guess we all have different priorities in life.

I'm not of the school which believes that the Caravan Club is universally incompetent. Instead I suspect that insisting that numeric data in the 'mobile' field is another issue arising from the website upgrade. Several members have posted that it's easy to work around.

But the issue of internet access to an address is of major importance to us all. Reports from the house sales industry at national level say that house values where there's poor internet access can be UP TO 20% lower than an equivalent house with good access. The Government is keen that fibre connections are more readily available, and has accordingly provided some provision funding. Rightmove publishes internet speeds on house details. A study in 2016 revealed that 71% of buyers would reject an 'otherwise ideal home' which did not meet minimum requirements. Broadband is now regarded as the fourth utility. Although you may not be able to imagine turning down a purchase on the grounds of poor connectivity, it seems that over two third of us feel differently. As you say people have different priorities, but it may be worth factoring house resale values amongst them.