The week’s best buys

Costain Investors Chronicle

The nuts and bolts of the engineering group’s business are solid and the forward order book remains steady. Investing in tech skills to exploit the “smart infrastructure” market should bode well. Buy. 463p.

G4S The Times

Shares in the security group are looking cheap after a long time out of favour. Results show discernible progress, and most of the “portfolio reshaping” – including dumping the outfit running Guantánamo – is done. Higher dividends beckon. Buy. 258.5p.

Mid Wynd International The Daily Telegraph

This global investment trust has limited exposure to Brexit, and its focus on “themes”, such as emerging-market consumers, should see strong growth. Performance is “remarkably steady”. Buy. 486p.

Mysale The Times

The flash-sale fashion website – a useful outlet for retailers jettisoning excess stock – is going great guns, especially in the southern hemisphere. Six successive quarters of revenue and profit growth points to an upward trajectory. Buy. 113p.

Polypipe The Daily Telegraph

The plastic pipe-maker’s flexibility and cornering of the imperial measurements market makes it well placed to serve the UK market, which accounts for 90% of profits. A trusted brand with strong growth and a decent yield. Buy. 393.2p.

Sirius Minerals Investors Chronicle

Annual pre-tax losses at the prospective potash miner, which is seeking a partnership with the Government to mine near Whitby, were considerably less than forecast. The market seems bullish about the preliminary figures. Buy. 28.1p.