Swansea lead 1-0 at the break at Craven Cottage. Danny Graham got the goal in the 19th minute, after Nathan Dyer's shot was parried.
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Wales head coach Rob Howley admitted his side's performance 'simply wasn't good enough' against Scotland this afternoon.
It will be cloudy with outbreaks of rain at first, but most of the rain will clear by morning.
Despite leading at half time, Howley's men failed to score in the second half with Scotland racking up 20 points to seal the win.