Plenty of options out there. there are people who ride in Aeros; as with anything, opinions about suitability vary. If the Aero works for you, in terms of leather for the slide there'll be one of the hides (either the heavier steer and horse, or goat - goat being second only to roo in terms of abrasion resistance). For an impact fall, leather alone won't help much, you need the armour. Modern d30 type armour is thin and unobtrusive, just make sure you try the jacket on with back-protector in place in case you find you need a little more room. An armoured, kevlar undershirt and/or longjohns like those offered by Bowtex basically gives you complete freedom of whatever you want to wear on top. A tweed suit would be fine, even - but it might not be so comfortable on a hot day. Goldtop offer the widest range I've yet seen of leather jackets with an original 50s to 70s style that can also take armour as standard. The back plates can give a little show-through on the jacket, but if that bothers you, it could always be removed if you're just wearing the jacket around. If you're looking at motorcycle clothing sourced from the UK or EU, watch the descriptions. Under EU law, there is now a clear distinction between motorcycle ppe and motorcycle style clothing. Nowhere is allowed to sell anything as 'proper' motorcycling wear unless appropriately classified. Also worth checking what exactly is classified - I think the new system is designed to try and make this clearer, but there is a difference between a jacket containing ECE rated armour and an armoured jacket which is ECE rated as a complete garment. It's not yet clear what the "British Standards" with which the present Westminster government intends, post-Brexit, to replace the ECEs will be, though in practice I suspect many companies might choose just to stick to the ECE standards rather than spend the money on a separate set of classifications for the UK market only, especially given they'll needed ECE certification to sell into the EU (a much bigger market, obviously).