UEFI taking ages to download

[Matt-Mcl]

After clicking deploy WOA just gets stuck on "Downloading UEFI". It shouldn't be a connection issue as running a speed test reports 150MB/s+. The time reported in the log for "Downloading UEFI" is 14:50 and when making this post it is now 15:35. Surely it doesn't take almost an hour to download the UEFI..?

Raw log:

2020-02-10 14:49:52.006 +00:00 [Verbose] The '""' does not exist
2020-02-10 14:50:07.584 +00:00 [Verbose] Default directory for WimFolder has been set to "E:\sources"
2020-02-10 14:50:07.591 +00:00 [Verbose] Trying to load WIM metadata file at '"E:\sources\install.wim"'
2020-02-10 14:50:07.630 +00:00 [Verbose] Getting WIM stream
2020-02-10 14:50:07.632 +00:00 [Verbose] (WIM) Finding Magic Bytes...
2020-02-10 14:50:07.632 +00:00 [Verbose] (WIM) Found Magic Bytes at 0
2020-02-10 14:50:07.633 +00:00 [Verbose] (WIM) Finding WIM XML Data...
2020-02-10 14:50:07.633 +00:00 [Verbose] (WIM) Found WIM XML Data at 046094058462
2020-02-10 14:50:07.676 +00:00 [Verbose] Wim metadata deserialized correctly WimMetadata { TotalBytes: "4609405846", Images: [ImageMetadata { DirectoryCount: "24780", FileCount: "104135", TotalBytes: "17341893904", HardLinkBytes: "6424710455", CreationTime: Time { HighPart: "0x01D4DE5B", LowPart: "0x4CD95B64" }, LastModificationTime: Time { HighPart: "0x01D5E020", LowPart: "0x9E10EAA9" }, WimBoot: "0", Windows: Windows { Arch: "12", ProductName: "Microsoft® Windows® Operating System", EditionId: "Professional", InstallationType: "Client", ServicingData: ServicingData { GdrDuRevision: "0", PKeyConfigVersion: "10.0.18362.1;2016-01-01T00:00:00Z" }, ProductType: "WinNT", ProductSuite: "Terminal Server", Languages: Languages { Language: "en-GB", Default: "en-GB" }, Version: Version { Major: "10", Minor: "0", Build: "18362", SpBuild: "628", SpLevel: "0" }, SystemRoot: "WINDOWS" }, Name: "Windows 10 Pro", Description: "Windows 10 Pro", Flags: null, DiplayName: "Windows 10 Pro", DisplayDescription: "Windows 10 Pro", Index: "1" }] }
2020-02-10 14:50:07.680 +00:00 [Verbose] WIM metadata file at '"E:\sources\install.wim"' retrieved correctly
2020-02-10 14:50:19.834 +00:00 [Information] Downloading UEFI