engine specialist, midlands

[trackcar]

Anybody got any good recommendations for a beemer engine rebuild specialist in the midlands(derbyshire/south yorkshire) area? One of the blokes for a courier firm that delivers to me was asking as his 323i is apparently a little under the weather and wondered who was the best place to take it to .. sounds from his description ike it's a bit tired and could do with a bit of a freshen-up.

any ideas?

thanks in advance, joo