If OP is 40 and intends to retire at 65 and assuming is is a basic rate tax payer, then his £200 will only cost him £160 plus £200 from the company. That equates to £72,000 in contributions by the time OP is 65. If the fund performs well, then the value may well reach £200k.
That would entitle...
Anything is better than nothing.
You are getting free money from your employer and could be worth a load more in you hit 40% tax, but still a nice saving at 20% tax.