That looks to me to be a new fibre install, the green you see is the “tube” protecting the fibre. It definitely needs fixing to the wall, top and bottom, although I don’t necessarily see the need for extra covering. As it stands it could easily get caught or pulled and break the fibre.
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Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2