A £79 offer at Moss Bros this week.
www.moss.co.uk/suit-offer?utm_source=Communicator&utm_medium=Email&utm_content=Untitled3&utm_campaign=%c2%a379+Suits+%7c+So+Santa+won%27%27t+be+the+only+one+in+a+great+suit+this+Christmas&_ccCt=tJQDYh1QkuN70Zr_EbLWrPX8DU9lROL0NBTlhry7G7GKUVV7EqVOMrlwnabJ0zCs
The samples I looked at were all in the "Esq" or "London" ranges and synthetic fabrics. They have other ranges.
Along the top line are links for "Sale" and "offers" and sometimes they have a "clearance" section (it will be full of Part and Black Tie bargains the day after Christmas). I believe they sell lots of ties and gloves at this time of year.
If you are lucky enough to have a DS or DP who is unusually tall/thin/fat/short they often have oddments in unpopular sizes at giveaway prices.