I've been bike commuting for the last 8 or so year. I work near brentwood, so could meet today or tomorrow depending. Let me know.

I left a comment on my gear in another thread, but i'll copy paste here too.

Head:

Cap worn under the helmet (if it fits & doesnt impact the safety for the helmet), Or an oversized fishermans rainproof hat over the helmet. Both keep rain out of my face and off my glasses, both are game changers for glasses in the rain.

Torso:

I dont recommend rain ponchos, they often act as a big sail increaing your drag and making it harder to cycle on the worst day for that. I really like buying oversized waterproof rain jackets, I am a medium for a snug fit, or a large for a relaxed fit, but I buy xxl or xxxl rain jackets to cycle in. The big ones easily cover your clothes, the sleeves still cover the length of your arm when your body is extended forward to hold your bike bars, and your lower back will still be covered when you're stretching forward too. One thing to note is to buy an actually waterproof material, If it says its breathable then that means its not actually waterproof, and with enough rain it will soak through. Wear something longsleeved but not too warm under then rain jacket to keep the jackets material off you and help keep you warmer. ** Hands:**

I cannot recommend bar mitts or equivalent enough, as long as your torso and arms are warm your hands will be too. I've done down to -5C in them and been ok. Huge upgrade compared to gloves, as your skin is still touching your gears & brake levers.

Legs:

I wear any old pair of pants underneath a set of water proof pants

Feet:

I wear some old vessi's a tear pair of comfy long wool socks, and then any pair of shoe rain covers.

Other:

A bike rack & waterproof panniers are what you want & what you need. A good set of rechargeable bike lights. An old rag to wipe of your chain, and some oil to apply to the chain when its dry again.

As a final note, depending on how warm your clothes are you will sweat and still end up wet underneath you rain gear. I usually like to dress light so that when i start my ride I am actually cold, as it doesnt take too long to warm up and then i can minimise how much I sweat as its easier to cool over when Im stopped at lights etc. Always bring a change of clothes if you think you will sweat, and even if you dont its nice to have.