RG213 is better but needs 9mm PL259s.
rg213 uses 10.3mm plugs,9mm plugs are too tight for it,and that isn't even taking into account 9mm plugs are generally very poor build quality using substandard materials.
at the sort of length your talking about for 27 mhz just about any 50 ohm coax will do as losses will be minimal even with rg58c/u.if your not good at soldering the best plugs too use are compression types,a bit more expensive but far more reliable if soldering the braid too the plug isn't one of your strong points.rg213 or rg58c/u being tougher will easily outlast the mini 8 type cables in the uk weather.make sure you seal up the plug at the antenna end with self amalgamating tape or water ingress will destroy any cable you use.if you must use foam type low loss cables then ecoflex 10 or lmr240 or lmr400 are probably your best choices for hf.
the main thing too watch for in coax in these days of lots of locally generated noise is good quality shielding,noise will be a far bigger handicap than losses via coax will ever be.too many people are hung up on cable losses,but you can't talk too what you can't hear because of noise,no matter how good your cable losses are.
if you have more money than sense you could use ldf-650,would be a bit like using a net from a fishing trawler to catch a baggy minnow though.