Thanks to EvoraBob for the chat we had at Lotus in the Peaks. Then subsequently, looking at his posts on here.
I decided to take the plunge and do the air intake upgrade. It was surprising easy (I'm no car expert) and straightforward to do. Just take your time. I did it all in a couple of hours.
Below is a list of parts and prices. The total cost is about £130 max. (As of 16/07/2023)
CarBole Universal Cold Air Intake Filter Alumimum Kit with Clamp Accessories
Amazon
£29.99
SOLID BRASS 6 mm barbed Hose joiner/connector. PACK OF 2.
Amazon
£3.75
Brass Reducing Barbed Connector BSP Hose Tail Tubing for Air Fuel Water (6mm to 10mm)
Amazon
£6.79
Brass Fitting Hose Barb, Tail Reducer Reducing Plug Connector(10-25mm)
Amazon
£8.11
Steel Band Metal Fixing Strap with Perforated Holes, Builders All Round Band 10 Meter Roll (12mm Black)
Amazon
£6.75
1 x 25mm>35mm Worm Drive Hose Clip Jubilee Type Stainless Steel - 1 Clip
Auto Hose
£1.61
1 x 70mm>90mm Worm Drive Hose Clip Jubilee Type Stainless Steel - 2 Clips -
1 X 13mm>20mm Worm Drive Hose Clip Jubilee Type Stainless Steel - 1 Clips -
Auto Hose
Auto Hose
£3.24
£0.74
1 x 76mm Silicone Hose 45 Degree Elbow Blue -
Auto Hose
£21.30
1 x 76mm Silicone T Piece Hose Joiner Blue
Auto Hose
£20.30
Maf Air Flow Meter 76mm Air Flow Sensor Adapter Fit For Toyota
Ebay
£18.97
£121.55
Universal Cold Air Intake
https://www.amazon.co.uk/dp/B08G7XP76R?ref=ppx_yo2ov_dt_b_product_details&th=1
Brass 6mm hose joiner
https://www.amazon.co.uk/dp/B00V6EJ2RQ?psc=1&ref=ppx_yo2ov_dt_b_product_details
Brass 10mm to 6mm hose joiner
https://www.amazon.co.uk/dp/B07R7LM2HP?psc=1&ref=ppx_yo2ov_dt_b_product_details
Brass 25mm to 10mm reducer hose
https://www.amazon.co.uk/dp/B07Q21CTF4?ref=ppx_yo2ov_dt_b_product_details&th=1
Steel fixing strapping
https://www.amazon.co.uk/Galvanised-Steel-Fixing-Perforated-Builders/dp/B08M3L7YYZ/ref=asc_df_B08M3L7YYZ/?tag=googshopuk-21&linkCode=df0&hvadid=480182876042&hvpos=&hvnetw=g&hvrand=16295986980136829751&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9046389&hvtargid=pla-1031287178638&th=1
76mm 45 degree silcone hose (It will need cutting down best with a sharp Stanley knife)
https://www.autosiliconehoses.com/silicone-hose-45-degree-elbow-bend-automotive-hoses-black-blue-red.html
76mm T connector with 25mm reducer (It will need cutting down best with a sharp Stanley knife)
https://www.autosiliconehoses.com/silicone-hose-t-piece-connector-automotive-hoses-black-blue-red.html
Same link for all stainless steel worm clips
2 X 70mm to 90mm
1 X 25mm to 35mm
1 X 13mm to 20mm
https://www.autosiliconehoses.com/hose-clips-worm-drive-w1-zinc-plated-w4-stainless-steel.html
Maf Air Flow Meter 76mm Air Flow Sensor Adapter Fit For Toyota
https://www.ebay.co.uk/itm/334927576999
I hope this helps others and once again thank you to Bob for his advice and help. The first picture is of Bob's to compare.