The coaxial cable is stiff by nature as it has a single core wire at the center, you cannot modify the cabling yourself as could cause noise to enter the system, only a VM engineer can do modifications if there is no fault it will be charged at £99 for the call out and work.
Coaxial cable can last a lot more than 20 yrs.
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Thanks Mike. You say that it can last more than 20 years. Does this mean it could also break down within 20 years? I don't suppose there's any way of testing so at £99 it seems we'll have to live with a large ball of Coax in the lounge. Thanks again