Sent the formal rep across that Hippocrates suggested, just added the following "Lack of advance warning/adequate signage when approaching from the side road, further exacerbated due to detrimental weather conditions and traffic conditions."
Although Im a tad bit worried if I've gone past the 28 days (EN dated 13th Feb, I believe 28 days was yesterday but I sent it right now, 30 past midnight).
Also the TH website is a bit odd I clicked make formal rep but it took me to the same page as a informal rep (see attached), so couldn't tell if this will be classed as a formal rep or not :/