Please can you recommend the best at-home treatments for a sun-damaged neck? Would at-home micro needling make a difference?

Start with good, active skincare – a vitamin C serum, a moisturiser and a sunscreen in the morning, and a retinoid in the evening – and see what difference that makes. I’m not keen on home microneedling because most skincare products are not designed to be bombed deep into the skin through needled holes, and also most of us are not very careful about needling all areas of the skin equally, and gently. I’d prefer you stuck with skincare and when your skin is acclimatised to the retinol or retinoid that you’re using, moving up to a stronger product, to keep stimulating your skin to renew itself.