My sport needs a new battery any suggestions where to get one and which one to get, what's best value for money? Thanks

Genuine lr ones are the best tbh. About £105ish and you know it will cope with the high power requirements already.  Bodsys Brake Bible
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Not knowing what Sport you have, I provide details for both:

All Petrol Models

Type: Maintenance free lead calcium
Capacity: 690 amps - 75 amp/hour
Reserve Capacity: 150 minutes @ 25 amps

All Diesel Models

Type: Maintenance free lead calcium
Capacity: 825 amps - 90 amp/hour
Reserve Capacity: 190 minutes @ 25 amps

PS: Please include your Sport model in your signature/profile
PS: I have no idea of battery prices in Edinburgh!  Malaysia Boleh!
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you can put the diesel model battery in your petrol. Just means you have more power available, no detrimental effects.  Bodsys Brake Bible
Software Updates Contact me
RRS Timed Heat/Remote kits - Contact me
BAS Engine Re-maps/ EGR Blank EuIII and EuIV
Clock On The Dash/ SNOTM /3Flash / BT Update /Service Reset/Error Codes read\ Gearbox Reset
See it HERE