Opinion on Build???

Solution
Do not waste your money on that build.
Blackbirds is much much better.

Kaveri (the architecture your CPU uses) was crappy back in 2014 when it came out, not to mention that with that platform you have nothing but a crap upgrade path as the BEST you can get for that platform cant beat a core i3 from 2014.

Blackbirds setup will be much better then the A10 right off the bat, and gives you an actual upgrade path and should even support the next 2 releases of intel processors.
Better build and upgrade path for the future card and other upgrades

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G4560 3.5GHz Dual-Core Processor (£51.99 @ Ebuyer)
Motherboard: MSI B250M PRO-VH Micro ATX LGA1151 Motherboard (£63.99 @ Ebuyer)
Memory: Crucial Ballistix Sport 8GB (2 x 4GB) DDR4-2400 Memory (£49.25 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.98 @ Amazon UK)
Case: Thermaltake Versa H23 ATX Mid Tower Case (£26.48 @ Aria PC)
Power Supply: EVGA 430W 80+ Certified ATX Power Supply (£32.88 @ Aria PC)
Optical Drive: LG GH24NSD1 DVD/CD Writer (£13.85 @ Amazon UK)
Total: £280.42
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-05-03 23:28 BST+0100
 
Do not waste your money on that build.
Blackbirds is much much better.

Kaveri (the architecture your CPU uses) was crappy back in 2014 when it came out, not to mention that with that platform you have nothing but a crap upgrade path as the BEST you can get for that platform cant beat a core i3 from 2014.

Blackbirds setup will be much better then the A10 right off the bat, and gives you an actual upgrade path and should even support the next 2 releases of intel processors.
 
Solution
Ditto.
You don't need an optical drive though, most stuff is USB nowadays, even windows.
Drivers should also be installed directly from the manufacturer's site rather than through discs.
Here's my suggestion.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G4560 3.5GHz Dual-Core Processor (£51.99 @ Ebuyer)
Motherboard: Gigabyte GA-B250M-DS3H Micro ATX LGA1151 Motherboard (£66.70 @ Ebuyer)
Memory: ADATA XPG Z1 8GB (2 x 4GB) DDR4-2800 Memory (£50.63 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.98 @ Amazon UK)
Case: Fractal Design Core 1100 MicroATX Mini Tower Case (£29.99 @ Amazon UK)
Power Supply: EVGA 430W 80+ Certified ATX Power Supply (£32.88 @ Aria PC)
Total: £274.17
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-05-04 00:09 BST+0100